The Buzzing Circuits Crate

Use electricity and switches to make a buzzing game and alarm!


  • Switches in Circuits
  • Telegraphs & Morse Code
  • Alarms in History

Buzzing Circuits

More awesome hands-on video tutorials at!

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Tinker Crate library

Cover art of the book  Spy Science

Spy Science

Jim Wiese

You just learned how to set alarms to secure your stuff — now learn other techniques of the spy trade! With 40 different undercover activities, you’ll be able to keep your secrets safe, and maybe even catch a spy or two of your own.

Get the book ➜