Mathematics and ink combine in this fun set of math-related tattoos. More than 40 math tattoos on two sheets allow you to display math puns, equations, and math icons in a unique way. This makes a great stocking stuffer, novelty prize or birthday gift for the math nerd in your family.
See the constellations visible in the Northern Hemisphere on this watch!
The Hoberman Sphere expands and contracts with a magical motion so fluid and simple that kids can't help but play with it for hours.
Cool new Pi tee featuring ultra soft and light blue 100% cotton shirt.
The Ball of Whacks is the perfect creativity tool for innovators, artists, engineers, writers, students, and you!
Build an electromagnet, an electrical catapult, a doorbell chime, a telegraph, and more with this kit!
Discover how solar cells make electricity with this awesome kit!