Bleep Labs has introduced the Nebulophone – an Arduino-based synth with a Stylophone like keyboard.

It has adjustable waveforms, a light controlled analog filter, LFO, and arpeggiator that can be clocked over IR.
This is a beginner kit and does not require an Arduino programmer board.

It’s in pre-order status now for $55 and is expected to ship around Feb 19th.