# Telegraph  ## ~avatar Build a telegraph between two @boardname@s to communicate with your friends! ## ~ ## Duration: ~30 minutes ## Materials * 2 @boardname@s, a battery holder, and 2 AAA batteries * 4 crocodile clips ## Activities * [Make](/projects/telegraph/make) * [Code](/projects/telegraph/code) ## ~button /projects/telegraph/make Let's get started! ## ~