The Perplexus Twist puzzle comes with a wicked twist--you have to actually twist and realign the tracks within the shell to get the ball to the very end of the maze. Thought you knew what a hard puzzle was? You had no idea----this is the perfect puzzle for the puzzle fan in your family looking for the ultimate puzzle challenge.
This magic bird defies gravity before your very eyes!
Ever wonder how to survive in the wilderness? These cards can help!
This wind power kit is an excellent green science project!
Build 7 vibrating robot models you can control and move about thanks to an imbalanced weight system! Learn about physics!
Build your very own smart robot!
This illuminated orbiter is great for demonstrations in the astronomy classroom!