This toy launches a small plastic ball by the use of a see-saw type lever. The grooves on the bottom of the see-saw allow the child to place it at different points on the base, which acts as a fulcrum. This introduces children ages three and up to the concept of a lever and also to projectile motion. All pieces of this toy will be made out of plastic to ensure safety, durability, and to minimize costs.
mwykosky@andrew.cmu.edu