Make your voice sound like a robot with this cool voice changer solder kit. Add vibrato effect, or use the pitch buttons to make your voice sound lower or higher. It also comes with a built-in power amplifier and microphone--simply add a speaker to the unit. Great for pranks, as a novelty toy, or as a stocking stuffer.
Learn all about Newton’s Laws and Energy conservation.
This smaller transportable Van de Graaff Generator will easily fit in any classroom!
A massive mounted set of 100 rocks and minerals found in the US,
This classic desk toy will keep you amused! Large, 7 inch tall version.
Discover a world of kaleidoscopic effects within this perfectly clear prism of the Light Crystal!
Discover how solar cells make electricity with this awesome kit!