Turn your kitchen table into the coolest mad science lab in the neighborhood. Click on the project name for link to written how-to instructions and the science behind the fun!
1. Frankenworms– Bring gummy worms to “life” using baking soda and vinegar.
2. Alien Monster Eggs– Make creepy, squishy monster eggs.
3. Oozing Monster Heads– Combine science and art to create Halloween fun.
4. Bag of Blood– Amaze your friends with this magical science trick.
9. Magic Potion– Make a color-changing, foaming potion using red cabbage and water.
10. Halloween Soda Explosion– Halloweenize the classic Diet Coke and Mentos explosion
11. Foaming Alien Blood– Bring the X-Files to your kitchen with this creepy green fake blood
12. Mad Scientist’s Green Slime– Because everyone loves slime
13. Homemade Fake Blood– It’s simple to make non-toxic fake blood in your kitchen.
14. Fizzy Balloons– Draw scary faces on balloons and blow them up using baking soda and vinegar.
Yesterday on Twin Cities Live, I demonstrated some fun botanical science projects for learners of all ages, including Vegetable Vampires and Leaf Chromatography.
This fun art/science project lets you transfer plant pigments to cloth, creating beautiful prints of your favorite leaves and flowers. It’s especially great for fall, when there are so many colorful leaves around.
-Fresh leaves and flowers (Dry leaves won’t work.)
-A hard, smooth pounding surface, like a wooden cutting board or carving board
-Wax paper or plastic wrap
-Mallets or hammers
-Untextured cotton cloth, like a dishtowel. Heavy cloth works better than very thin cloth.
-*Alum and baking soda to treat cloth (This is optional. I don’t pre-treat my fabric, but the treatment step will help bond and preserve color, if you want to frame your prints. You can also buy fabric that’s pre-treated for dyeing.)
Safety tips: Protective eye wear is recommended. Young children should be supervised when using mallets and hammers.
What to do:
*If treating cloth: The day before you do the project, add 2 quarts water to a large pot. Add 1 Tb alum and 1 tsp baking soda to the water. Add the cotton and bring to a boil. Simmer for 2 hours, turn off heat and soak for at least two hours. Let fabric dry.
The next steps are the same, whether you’re using an untreated piece of cotton or treated cloth.
- Take a walk to collect colorful leaves and flowers. Choose plants that can be flattened. Flowers with huge centers, like coneflowers don’t work as well, but petals may be removed and pounded.
- Cover the pounding surface with waxed paper or plastic wrap.
- Cut a piece of cloth that will fit on the pounding surface when folded in half. Iron the fold.
- Open the cloth and lay it on the pounding surface. (See image above)
- Arrange leaves and flowers on the cloth.
- Fold the cloth over the plants and pound it with the hammer or mallet. If you’re using a hammer, pound more gently.
- Pound until you can see the forms of the leaves through the fabric. As the pigment leaks through, you’ll see the outlines of what you’re smashing. Hint: Hammers work better than mallets for fall leaves. For juicy leaves and flowers, use a mallet or hammer gently.
- When you’re finished pounding, unfold the fabric to reveal the print you created. Remove the leaves and petals.
- Label the image with plant names, enhance it with paint or markers, or leave nature’s design to speak for itself.
The Science Behind the Fun:
Pigments are compounds that give things color, and many of them are found in nature. Flowers, leave, fruits and vegetables are full of brilliant pigments. In this experiment, we transfer plant pigments to cloth by bursting plant cells using pressure from a hammer or mallet.
The green pigment found in leaves is called chlorophyll. In the fall, many trees stop making chlorophyll, and the red, yellow and orange pigments inside the leaves become visible.
Although you create a mirror image of leaves and flowers, you’ll notice that the color may be more intense on one side of the print. A waxy covering called a cuticle covers leaves, and is sometimes thicker on the top than on the underside of the leaf. It may affect the transfer of pigment to the cloth, making it easy to see structures like veins on the leaf print.
What parts of the leaf can you identify in the print you created?
This fun project from my book Outdoor Science Lab for Kids shows you how to collect and identify amazing arthropods using a net you make yourself. For more engaging outdoor experiments, you can order the book here, or anywhere else books are sold.
– sweep net or: two wire hangers, an old, light-colored pillowcase, scissors, pliers, long wooden broomstick or sturdy yardstick, and duct tape
– area with long grass
-large white piece of fabric, like an old sheet
– insect identification books (optional)
Safety Tips and Hints
- Don’t pick insects up with your bare hands, unless you know they don’t bite or sting.
- Ticks love tall grass. If there are ticks in your area, take precautions and do a tick check after your insects hunt.
Step 1: If you don’t have a sweep net, make one by straightening and twisting two wire hangers together. Form them into a loop, leaving about 3 inches (8cm) straight on either end. Cut about one third off of the open end of a pillow case and pull the mouth of the pillowcase over the wire loop. Tape it securely around the perimenter.
Step 2. Find an area with long grass and plants. Sweep with your net the same way you’d sweep a floor, but flip the open side of the net back and forth to capture insects in the grass.
Step 3. Close your net by flipping the bottom over the top and take it over to your large piece of fabric.
Step 4. Carefully dump the creatures you’ve collected onto the white fabric to inspect them. If you want a closer look, put an insect inside a jar with a loose lid.
Step 5. Count how many legs they have, how many body segments, look for antennae, wings and unique color. Record your observations in a notebook.
Step 6. Use insect identification books, or other means to identify what you’ve found.
Step 7. Keep a journal of the insects and arachnids you capture, the time of day, and where you found them.
The Science Behind the Fun:
When you sweep, chances are you’ll find lots of insects, which are arthropods with six legs. They often have wings, and their life cycle goes from egg to larva, to adult. Some insects, like butterflies, also go through a pupal stage, in which their bodies are significantly transformed. The antennae on their heads are sensory organs.
Saturday April 22nd is Earth Day, so get outside and show our home planet some love! Whether you’re picking up trash or visiting a park, it’s always fun to throw some science into the mix.
Here are some of our favorite environmental science experiments. Just click on the experiment names for directions and photos. You can find more fun outdoor experiments in my books “Kitchen Science Lab for Kids” and “Outdoor Science Lab for Kids“ (Quarry Books.)
Homemade Sweep Nets: Make a sweep net from a pillowcase and a hanger to see what arthropods are hanging out in your favorite outdoor spaces.
Window Sprouts: Plant a bean in a plastic baggie with a damp paper towel to see how plants need only water and air to sprout roots and leaves. Here’s a short video demonstrating how to make a window garden.
Homemade Solar Oven: Using a pizza box, aluminum foil, plastic wrap, and newspaper, you can harness the sun’s energy to cook your own S’mores!
Nature Walk Bracelets: Wrap some duct tape around your wrist (inside out) and take a walk, sticking interesting natural objects like leaves and flowers to your bracelet. It’s a great way to get outdoors and engage with nature!
Carbon Dioxide and Ocean Acidity: See for yourself how the carbon dioxide in your own breath can make a water-based solution more acidic. It’s the same reason too much carbon dioxide in Earth’s atmosphere can be bad for our oceans.
Plant Transpiration: See how trees “sweat” in this survival science experiment.
Earthworm Experiment: Do you know what kind of earthworms are living in your back yard?
Composting: Be a composting detective. Bury some things in your back yard (away from power cables) and dig them up in a few months to see how they look. Composting reduces methane gas emissions (a greenhouse gas) from dumps.
Diffusion and Osmosis: See for yourself how the chemicals we add to water, put on our streets to melt ice, and spray on our lawns and crops can move into our soil, ground water, rivers, lakes and oceans.
Solar Water Purification: This project illustrates the greenhouse effect and is a fun “survival science” experiment. Requires hot sun and some patience!
Citizen Science: Don’t forget about all the real environmental research projects you can participate in through Citizen Science programs all around the world!
For mores activities and games, check out NASA’s Climate Kids website, to see a kid-friendly diagram of the water cycle, click here, or just get outside and enjoy the beautiful planet that sustains and nurtures us.
Tillandsia, also known as Air Plants, come in many shapes, sizes and colors. In nature, you’ll find them living in trees in warm places like South America. They collect moisture from the air and rain, rather than pulling it up via roots like most plants, so you can care for them with a weekly misting.
Pick up a few clear, hollow “decorate your own” ornaments, and you can use these living wonders to make unique homemade decorations. We’re giving them as gifts this year.
-clear ornaments with removable tops
-small Tillandsia that will fit through ornament tops (Air Plants are available at most nurseries. Ask for care instructions, if they have them.)
-needle nose pliars, or tweezers
Note: Choose plants that are small enough to fit through the openings of your ornament!
Mist your plants, or soak them in a bowl of clean water for 15 minutes or so, gently shake off the excess water, and carefully push them into the ornaments, bottom first so you don’t harm the plant. Put the top back on the ornament, leaving it loose enough for air to circulate.
Once a week or so, remove the top of the ornament and add some water. Coat the entire plant with water, pour out the excess and put the top back on. After the holidays, you can remove the plants with tweezers and move them to a new home in a vase, bowl or other clear container.
(Adapted from Kitchen Science Lab for Kids)
Grab an extra bag of cranberries this Thankgiving! Kids can use it to reveal invisible messages they write with baking soda and water.
-around 2 cups of cranberries
-small paintbrush, Q-tip, or lollipop stick
Safety tips and Hints:
Boiling the berries should be done by an adult. Keep the lid on the pan, since the air pockets that make cranberries float can also make them explode. Kids can take over once the juice is cool.
When playing with cranberry juice, aprons or old clothes are a good idea, since it stains!
Step 1. Cut a cranberry in half and observe the air pockets that make it float.
Step 2. Boil the cranberries in about three cups of water for 15 to 20 minutes, covered. Listen for popping sounds as the air in the cranberries heats up and they explode.
Step 3. Crush the cooked berries and push the liquid through a sieve or colander to collect the concentrated cranberry juice.
Step 4. Allow the juice to cool and pour it into a casserole dish or cake pan big enough to hold a piece of paper. If your cranberry juice seems thick and syrupy, add a little water, so that it’s thin enough to soak into paper!
Step 5. Test the paper you want to use by cutting a small piece and soaking it in the cranberry juice. If it stays pink, it will work, but if it turns blue or gray, try some other paper.
Step 6. Add a few teaspoons of baking soda to 1/3 cup of warm water and stir well. Don’t worry if you can still see some baking soda.
Step 7. Using a Q-tip, paintbrush, or a homemade writing tool, use the baking soda solution as ink to write a message on your paper. It may take a little practice, so don’t get frustrated.
Step 8. Let your message air dry, or speed things up with a blow dryer.
Step 9. To reveal your message, place your paper in the cranberry juice and see what happens!
*What other natural acid/base indicators could you use to do this experiment? What else could you use as ink.
The Science Behind the Fun:
Cranberries contain pigments called anthocyanins (an-tho-SY-a-nins,) which give them their bright color. In nature, these pigments attract birds and other animals to fruit. This is important because animals eat the berries and spread plants seeds from one place to another.
These pigments, called flavanoids, change color when they come in contact with acids and bases. Cranberry juice is very acidic, and the pigment is pink in acids, but when you add it to a base, it turns purple or blue.
Baking soda is a base, so your baking soda message will turn blue when it comes into contact with the pigments in the cranberry juice. Eventually, when enough cranberry juice soaks into the paper, it will dilute the baking soda, turning the pigment back to red and your message will disappear!
There are over 300 kinds of anthocyanins which are found in many fruits and vegetables including blueberries, red cabbage, grapes and blueberries. Scientists believe they may have many health benefits.
Here are ten quick and easy experiments to make your Halloween even more fun and memorable!
Click on these links for instructions on how to make:
Here are a few of my favorites!
You can find more experiments by scrolling down on my website!
Unlike the foaming green alien blood in the X-Files, the blood pulsing through our veins is red, thanks to iron-containing hemoglobin molecules loaded with life-giving oxygen.
To make fake blood that looks like real blood, you’ll need to concoct a mixture of liquid, thickeners and red pigment (tinted with blue and brown.) Kids will have a great time coming up with their own concoctions. Have a creative chemistry contest to see who can come up with the most realistic fake blood, or use it to make scary Halloween props.
Here’s a recipe to start with, but kids can work with smaller amounts and mix their blood in bowls, rather than a blender. Fake blood stains everything it touches, so be prepared for messy hands and wear old clothes! Naturally red plant pigments, like the ones in pomegranate juice and raspberry jam won’t stain fingers as much as food coloring and taste yummy. However, red food coloring will give you a more realistic color.
1/3 cup pomegranate juice (like POM) or fruit punch
2 Tbs corn starch
1 Tbs chocolate syrup (or 1 Tbs cocoa powder)
1 Tbs red food coloring
1 cup corn syrup
Tint with a tiny bit of blue food coloring. (optional)
Other ingredients to try: seedless raspberry jam, cocoa powder, Kool-Aid, Jell-O, flour, maple syrup
Here’s a fun TV segment where meteorologist Matt Brinkman was game enough to try out one of the blood capsules we made!
We made the edible blood capsules you see in the video by filling empty gelatin and vegetarian capsules with a mix of raspberry jelly, corn syrup and chocolate syrup.
Our eight Monarch caterpillars were in chrysalises when we returned from our vacation, and yesterday the first of them emerged! We were lucky enough to catch it on our iPhone time-lapse, which makes everything look faster than it actually happens. You’ll be amazed at how the butterfly pumps fluid from its body to expand its beautiful orange and black wings.
Our neighbor brought us some Monarch Caterpillars the other day, and we found a tiny one in our garden. They’re now happily munching away on milkweed on our screened-in porch, safe from birds!
Here’s a short video on how to find and raise caterpillars, via my new book, Outdoor Science Lab for Kids.