Save with this pack of 10 buzzers. 9 Volts DC 400Hz. Great for Morse code circuits.
Works on 3 V DC (any 9V battery will do.)
Create your own circuits or test batteries and solar cells with this buzzer. Connect it to a battery and a key switch to make your own Morse code circuit.
Easily assemble a working alarm motion detector!
Every kid needs one of these spheres!
Build an electromagnet, an electrical catapult, a doorbell chime, a telegraph, and more with this kit!
Working model representing the sun, earth, and moon and their relationships.
See the constellations visible in the Northern Hemisphere on this watch!
Use this awesome prism to teach about optics and light in the classroom setting!