since we always leave the parks by noon, we like to go back to the parks in the evening, for the evening parade, fireworks, just to walk around since they're pretty at night, etc.....also some of the rides are nice at night (e.g. splash mountain)...
also, since we get up so early in the morning, we tend to go to sleep relatively early at night...
we usually go to the comedy club in PI one night, but your child is still too young for that...
and we sometimes go to DisneyQuest once or twice... (we have APs, so it's easy to pop into things for an hour or two)....but actually, we often do DQ in the afternoon rather than the evening...
also in the afternoons, after we leave the parks, we eat, then rest and watch some TV while DH catches up with work for a few hours on his laptop), then we swim, fish, rent bikes, boats, go to a movie (in DTD), etc......
in the late afternoon (about 5) we head over to TL (if it's not raining) until closing.....then we eat dinner and either veg out in front of the TV or go back to the parks or DTD....