Baby can rock it out with this play gym that features a unique musical mat that responds to your little one's kicks and bats. Start out by setting the attached boom box speaker to long play mode - your newborn will be entertained by 30 minutes of music while laying and playing with the dangling, music-themed activity toys. For tummy time, set the speaker to short play mode. The 3 instruments on the mat reward baby's touch with fun sounds, encouraging your wee one to push up, reach & bat. As your mini musician grows, remove the arches to let baby sit up and put on a musical show. Tots can even discover how to make the song grow by hitting the same instrument twice in a row! And when baby's "on break," detach the electronics and throw the mat in the washer to be ready for the next show. Musical mat play grows with baby! Baby can kick or bat the mat for musical rewards. Listen up! 4 linkable toys with fun sounds: maraca rattle, tambourine clacker, musical note teether & trumpet jingle. Boom box speaker with loop to link toys. Machine washable mat (with electronics detached) Helps tune up fine & gross motor skills. Did you hear that? Music, sounds, colors & textures help stimulate baby's developing senses. 2 AA batteries not included.