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.
Build your own metal detector robot!
Dig deeper, and discover the fascinating crystal structures of minerals and rocks with this great kit!
Perform awesome experiments using everyday materials found in any kitchen!
This genuine meteorite is great for the rock collector in your family!
This glass Erlenmeyer mug makes an excellent gift!
This science kit is an essential introduction to physics knowledge!