It seems like each year as our kids get older there are more and more opportunities – in sports, music, at school, with friends. But how much is too much? When does highly-scheduled become over-scheduled? One indicator, various researchers and pediatricians have suggested, is whether it affects our kids’ sleep. If they have a hard time either falling asleep at night or getting up in the morning, they are probably over-scheduled and under-slept to a degree that could be harming their development. If they’re falling asleep with difficulty, it could be because they are stressed, have spent too much time on a screen (TV,...