Penny Catapult
thingiverse
We're crafting a homemade catapult to launch pennies into the air using everyday materials. First, gather four wooden rulers and two pencil holders, which will be transformed into a sturdy frame for our catapult. Next, cut four pieces of string or twine, each about three feet long, to serve as the launching mechanism. Tie one end of each string to a ruler, leaving enough slack for the other end to be tied to the pencil holder. Place a penny in the center of the frame, then lift the strings to launch the coin into the air.
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