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 adapter-powered butterfly uses Flexinor wires to create a realistic visual effect!
Heavy-duty microscope for high-school and college biology labs. Magnification of up to 1000X.
This ultimate chemistry set features 250 mind-boggling experiments!
Provides the power to execute all the basic electrostatic demonstrations on an energetic and dramatic scale with up to 350,000 volts!
Experience this sphere powered by the sun!