Dear M.,
No, don't wake him up, unless the doctor has told you to do so for an extra feeding. Has he gone to bed in the late afternoon for a nap? If that is why you are worried, then you need to give him a short nap in the a.m., and then another one right after lunch, and be sure to wake him up about 2:30 or 3:00 so that you can put him to bed at 8:00 in the evening. It says it in the child development books - children of that age need rest. That is one reason that the get unreasonable. They are tired. Older people are like that too. We nap and thanks to God for that. We aren't so cranky and we enjoy life more too. You can drop the a.m. nap when you see that he doesn't need it, but you need to keep the after lunch rest going until he goes to school. As he gets older, then he can lay on his bed and play quietly, but he needs to rest when he is 4 and 5 too. Yes, I am right.
I realize that families do not take nap time seriously now a days, but it is a serious matter, the children's bodies and minds are accomplishing a lot of things, and they need rest. with a capital R. O.K.? C. N.