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how to build a craft stick catapult
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building a catapult is a fun stem
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activity for Scouts they can learn about
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you will need two large sturdy craft
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sticks seven smaller craft sticks seven
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rubber bands one plastic bottle cap and
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stack the seven smaller craft sticks
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together and use two rubber bands to
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rubber band the two larger craft sticks
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together at one end Slide the smaller
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craft stick bundle between the two
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you need to add a couple of diagonal
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rubber bands to keep the craft stick
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bundle in place place a rubber band
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diagonally over the craft stick bundle
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intersection wrap it several times to
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repeat this with another diagonal band
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cap to the end of the top craft stick
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use safety precautions younger Scouts
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will need adult help with this step
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now your catapult is ready to fire
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remember to only shoot in a safe
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Direction and wear safety glasses small
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marshmallows or erasers make good
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ammunition to fire just place your ammo
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in the bottle cap push down on the end
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if your catapult shoots more up than
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forward then you can try adjusting the
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position of the craft stick bundle or
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when you push down on the end with the
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bottle cap it stores up potential energy
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when you release the end the potential
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energy turns into kinetic or moving
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the energy is transferred to the object
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in the cap which launches
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then gravity pulls the object back down
