The Last Wired Telephone

Level: Grades 3 – 8    

Thomas Edison improved Alexander Graham Bell’s telephone 130 years ago. And that’s how phones were wired until…well, phones lost their wires. Take apart a classic handset. Add a battery. Wire a personal intercom. With follow-up experiments.

Cost: $8 per student

Connecticut Core Science Curriculum Framework 4.4 Electrical and magnetic energy can be transferred and transformed. 5.1 Sound and light are forms of energy.