I received the Love U Zoo Floor Crib Piano and I love it. Your baby can play with it on the floor when he is younger but you can also attached it to the crib. It has an on/off button for convenience. The baby can play with the animals (the crocodile slides, the flower spins, the lion head rotates and the monkey on the giraffe goes up and down). It also plays lovely melodies and it lights up in 4 different color. Very nice. It requires AA batteries.