My twins started to play in this everyday since they were 4 month-old. They are 6.5 months now. My little boy can walk and run in this for about 40 minutes at a time. He plays with the piano, chews on the bird and tree, and hits the dauphin real hard. He has not mastered the other toys, he will over time. My little girl is not as strong or as tall. She walks a lillte slow. She would dance with the music every time she plays the piano. They both had so much fun. It worth every penny we spent!