recognition, the cognition of different colors and shapes;2)Play A multifunctional piano fitness frame to accompany the baby more than 18 months3)Promote muscle development, the three-month-old babies can lie down and tap on the piano keys as well as touch the pendant,which will promote of the muscle development of arms and legs;4)Hand-eye coordination, six-months-old babies can sit and play the hanging ring bell, which will train grasping capability and flexibility of babies small hands;recognition, the cognition of different colors and shapes;2)Play A multifunctional piano fitness frame to accompany the baby more than 18 months3)Promote muscle development, the three-month-old babies can lie down and tap on the piano keys as well as touch the pendant,which will promote of the muscle development of arms and legs;4)Hand-eye coordination, six-months-old babies can sit and play the hanging ring bell, which will train grasping capability and flexibility of babies small hands;recognition, the cognition of different colors and shapes;2)Play A multifunctional piano fitness frame to accompany the baby more than 18 months3)Promote muscle development, the three-month-old babies can lie down and tap on the piano keys as well as touch the pendant,which will promote of the muscle development of arms and legs;4)Hand-eye coordination, six-months-old babies can sit and play the hanging ring bell, which will train grasping capability and flexibility of babies small hands;