Pianika is a small wind instrument like a harmonica, but uses keyboard blades that are about three octaves wide. The piano is played by direct blowing, or using a flexible pipe connected to the mouth. Generally pianika is played as an educational tool in schools.
Pianika is a wind instrument. In playing pianica music can be used to play the main melody, counter melody, if possible can also accompany songs. Use of piano keys:

White keys function to play the main / original notes.
Black keys function to play chromatic tones.
In playing the pianika musical instrument, the left hand holds the piano and the right hand presses to play the song's melody, while the mouth blows it.

Some of the things that need to be considered in playing pianica musical instruments are:

Playing with five fingers, each finger has the task of pressing certain keys.
The method of blowing is smooth and flat.
The right hand shape is like holding a ball so that it allows the fingers to move freely.
The search for Pianika usually uses the right hand which consists of:

thumb, as number 1 finger
index finger, as finger number 2
middle finger, as finger number 3
ring finger, as finger number 4
little finger, as finger number 5