The Rainforest™ Melodies & Lights Deluxe Gym™ has three different song modes:   music, nature sounds, and baby-activated “rattle” mode.  In the “rattle” mode, the music plays for approximately 8-10 seconds and stops.  Your baby’s movements will activate the sounds again.  If baby doesn’t seem to move enough yet to activate the music, we’d recommend using one of the other two modes.