B.W.
Guess what- only 1 or 2 naps and make the last one so that you wake him up at least 4 hours before his bedtime. I have a 3-1/2 year old boy and let me tell you we have had our share of sleeping problems with him. Just when you think he;'s settled down-boom!- he changes on you. You have to adapt to those changes. I'm not saying put up with it, I'm saying get a new strategy each time to keep him on regular sleeping times. Another thing, only stay up an hour or two after he goes to sleep. I know that can be hard but it will pay off. My advice in the beginning is what we did when our son was around that age. Your son is getting too much sleep during the day. I even shortened his snap times to the max of 2 hours per nap. Good luck!