If you love marshmallows, you’ll love this physics experiment for Halloween. We’ve taken our ordinary Marshmallow Slingshot experiment to a spooky new level by adding edible tattoos to the marshmallows for Halloween. (We found them online at Oriental Trading Company.)

They’d be perfect for any Halloween party. Set up some pumpkins as targets and watch elastic energy turn into kinetic energy as you fire away. Click here to see the original post and learn about conservation of energy.

A fun video about making these slingshots and showing them in action is on both the free and Premium versions of KidScience app for iPhones and iPod touch.

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