Multi-functional early education exercise, with soothing music, soft lighting, piano play mat 1.Lying down, exercising physical coordination for 0 -6 months, Play and promote the development of the baby's neck for 6 -12 months, Sit and play, exercise your arms and strength for 6 - 36 months, Soothing music allows your baby to fall asleep quickly (piano can be removed for use alone) for 0 -36 months The keys have light, high fidelity sound, and can have numbers 1 2 3 4 5 and letters A B C D E Can be used alone, improve utilization. Pendant and piano panel can be removed for use, pendant can be used in stroller, piano can be placed in crib to appease music enter the piano mode after power on: any stepping or pressing the piano button will emit a tonal tone. Song mode: Press the switch mode button to enter the song mode. If you step on or press the piano button, there will be a pleasant music. Chaotic mode: press the switch button for the second time, press the key, the main melody remains unchanged, change the rhythm according to the speed of pressing Safe material Great fun Different modes Removable Size: 29.5*23.6*17.7in Weight: 2.2lb Material: Plastic Age: Toddler