Two teams of kids design and build catapults to fling a tennis ball as far as possible. Two teams of kid engineers design and build catapults to fling a tennis ball as far as possible.
Q: I think my dad could design a really good pumpkin catapult. Are there any contests around this area to enter? -- M.L., Bettendorf A: I could find one that’s not far away. Morton, Ill., which is ...
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