This is a game for toddlers so I seriously hope you do not struggle to get thisFrom the main menu choose
Little PooYoo learning level and then select
Workshop and choose the '
Music' Turtle.
Once the game begins you will be told what do to, the three PooYoos are performing music and during this they fall asleep (Amazing I know) and its your job to press the button underneath the PooYoo that has fallen asleep to wake them up.
Its easy to tell when a PooYoo has fallen asleep as they stop playing their instrument and have ZZZ above their heads, the button presses are always the same:

for Elephant

for Turtle

for Rabbit
There are 3 songs to play and note
you can press the wrong button by accident and still get thisKeep 'playing' after this game in the workshop mode to unlock the following trophy if you havnt already
Here's a video (Sorry for broken audio)