In less than one day, Slippery Spheres will expand to over 200 times their size as they grow to the size of a marble! They will slip, slide and bounce. The more water you add, the bigger they get. To keep them hydrated, store in a sealed plastic bag or container. Or let them dry out to use over and over again. Slippery Spheres are completely reusable, safe for ages 4 and up, non-toxic, and environmentally friendly. Great for use as a science project or as a stocking stuffer.
Build over 60 projects with this deluxe version of the Snap Rover kit!
The large realistic model has removable organs that can be studied and set back into the correct position.
See the constellations visible in the Northern Hemisphere on this watch!
Learn Chemistry While Creating Sweet Treats
Provides the power to execute all the basic electrostatic demonstrations on an energetic and dramatic scale with up to 350,000 volts!
Build your own 10 inch kaleidoscope with this great kit!