This DIY snowball catapult is an excellent way to teach basic engineering concepts while having a blast launching cotton balls across the ... Place the plastic spoon onto one of the popsicle ...

Background A catapult works because energy can ... Try this activity to find out! Plastic bottle cap to hold a cotton ball Cotton ball (If you do not have any available, you can make a small ...

George Giavasis, who lives in Northwest Montana, created a tennis-ball catapult for his dog Olive to play fetch with. Sharing his invention online, Giavasis posted a video of the catapult on the ...

Catapult solved that problem by removing the transmitter from the chip inside the ball. Now the chip weighs just over half an ounce, so the ball stays within the specified range of 17 to 18 ounces.