This high-quality green laser module emits a line laser, has an adjustable focus lens, and operates on 3 to 6V DC. Great for DIY science and optics projects.
View the glory of space with this hi-tech telescope set!
NEW 2016 DESIGN! This hip red tee features Pi to 1000 decimal places on an ultra soft 100% cotton shirt.
Watch what your music can create with this amazing Snap Circuits set!
Every kid needs one of these spheres!
Experience this sphere powered by the sun!
Working model representing the sun, earth, and moon and their relationships.