Suzuki Push Pump P-Tunes MPP-8

When a push pump is pressed by hand, the air inside the pump is pushed out and the reed sounds.
It is a set of one octave, 8 notes.

Place it on a desk etc., and press or strike the top middle center of the instrument to play. Pressing slowly to produce a long sound, pressing quickly to produce a short sound, pressing strongly to produce a loud sound, and pressing lightly to produce a soft sound.