Nebulophone Kit, $59.00
I think everyone knows someone who likes things that make noise. They’ve probably even driven you crazy with an Atari Punk console at one time or another. Enter the Nebulophone. This Arduino based synthesizer takes 45 or so minutes to build and hooks up to your guitar amplifier or computer speakers. It features 5 different wave forms (aka sounds), is playable with the stylus through 6 octaves, and has tons of options. The arpeggio function records your licks and plays them back at varying speed, and there’s even a “hidden” mode for extra fun. This is one kit that will keep them busy for hours!