littleBits Electronics Synth Kit Price: $260.57 (as of 25/12/2019 05:39 PST- Details)

Modular analog synthesizer made up of 12 BitsTM modules that snap together with magnets to create circuits in seconds
Create amazing sounds right out of the box while learning the basics of analog synthesis
Project booklet with step-by-step instructions for creating a wide array of sound circuits and projects