Build a working cannon and learn about distance, height, and accuracy. Complete kit with ping pong ball. Individually packaged. Engineering 7 and 8, Bear 21a. Use as a comet launcher for a Space theme. Kit.
Build a working cannon and learn about distance, height, and accuracy. Complete kit with ping pong ball. Individually packaged. Engineering 7 and 8, Bear 21a. Use as a comet launcher for a Space theme. Kit.
