Sound waves will not travel through a vacuum. Prove it with this demonstration of a ringing bell inside a sealed glass jar. As air is gradually vacuumed out of the jar, the bell will become faint, and will eventually become silent. Great demonstration model for the classroom setting.
A combination of three of our great discovery toys, all in one package!
This kit includes several different projects that demonstrate the power of magnets!
Learn about hydrogen fuel cells with this incredible kit!
This magic bird defies gravity before your very eyes!
Learn all about the science of light, optics and visual perception with this wonderful kit!
Easily assemble a working alarm motion detector!
At xUmp.com you will find a large selection of scientific products carefully curated by real scientists and educators. We sell everything from educational toys, teacher supplies for science classroom, lab equipment, science toys, science fair supplies, classroom equipment, chemistry glassware, chemistry lab equipment, physics demos, electronics supplies, robots, science kits to geeky science gifts.