5. Chord Buddy
Source: Iconosquare
Now that we’re back to the more reasonable inventions (looking at you Cat-Man)… This invention is an attachment to any six string guitar to help you learn how to play. Think guitar hero, but a bit more realistic. It allows the player to slowly get the hang of notes and chords to make them a better guitar player. The company also has a bunch of videos to show how to efficiently learn with Chord Buddy and the product in action here.