Upon starting this level you will be playing as baby Groot and will immediately be in a short and easy button mashing game to plug in the sound system. This will start the song and cause Groot to dance along the perimeter of the stage, similar to the movie. Simply stay on Groot until the song finishes, it took roughly three minutes for the achievement to pop for me.
You will occasionally be attacked by what appear to be mice. If you have the Demoltion Mode pink brick on you can literally set your controller down while the song plays and Groot dances.