I recently watched part of episode 408 of Real Moms, Real Stories that talked about the over-scheduled child. Author David Elkind talked about the stress face by kids who have busy schedules. He talked about the importance of PLAY in good child development and later creativity.
He commented that though many of the top universities have 'top students' --- they are no longer as creative as they used to be. Kids NEED time to play -- as it is research to them and vital to their learning and growth and proper brain development.
When overscheduled, they don't have free time to explore and to play in an unstructured and unscheduled way. It's a disservice to them when parents think that they have to fit everything into childhood. By doing so they are taking out the most important thing time to learn, time to think for themselves, discover and explore.