Learn the basic principle of operation behind an electric bell. Great for science fair projects.
Operates on 3- to 6-V DC battery or 6- to 10-V AC transformer.
The coils and terminals are enclosed under a snap-on metal cover.
Bell is removable for use as a buzzer. Mountable.
Great reference card for chemistry and physics students.
Working model representing the sun, earth, and moon and their relationships.
Find the hidden crystals when you open your own geodes from this fun set.
Start a great hobby in electronics with this state of the art electronics project lab!
The Hoberman Sphere expands and contracts with a magical motion so fluid and simple that kids can't help but play with it for hours.
High-quality green laser pointer projects a green dot up to an incredible 2 miles away.