This video, via bigcitymusic, demonstrates the Critter and Guitari Pocket Piano:

The Critter and Guitari Pocket Piano is one of the coolest toys we’ve had the pleasure to come across in quite awhile. It’s very portable at 10 inches long and it weighs just a pound. The built-in speaker plays nice and loud. You can also run it into an amp or console from the 1/4″ jack on top.

The Critter & Guitari Pocket Piano offers six modes:

• Vibrato Synth
• Harmonic Sweeper
• 2-Octave Arpeggiator
• Octave Cascade
• Mono FM Synth and
• FM Arpeggiator

There are 4 waveforms: Sine, Square, Triangle and Sawtooth.

The Pocket Piano operates from a standard 9 volt battery or a 9 volt wall wart (positive center).

The Critter & Guitari Pocket Piano is available from Big City Music for $175.