- Buy 30 for $12.60 each and save 10%
This classic apparatus is standard for a reason - it works, and it's impressive! Rest the ball on top of the square that is set on the vertical post. Release the spring and the square is projected out. The ball falls into place on the post, remaining at rest as if nothing happened.
Products being sold are not toys. They are for Educational / Laboratory use only. They are not for use by children 12 and under.