Tiny Piano DIY KIT By Tiny Circuits, from Micro-Mark

Compose a tiny tune with the new TinyPiano! Built around the ATtiny841 microcontroller, this product features:

• 9 capacitive touch sensors
• 10 pre-loaded Nokia style ringtones
• A loud magnetic buzzer
• Simple coin cell power
• Seven of the capacitive touch sensors are piano keys and play different pitches.
• On either side of the keyboard is a functioning touchpad. Touching the lower pad while playing the keys will result in a lower octave. The high pad will give you a higher octave.
• Touching both function keys at the same time will play one of 10 randomly selected ringtones!