My son is 2yrs 3mths and he sleeps in a big bed and has done now for three weeks. I'm having trouble getting him to have a nap in the day and at the right time so he's tired enough to go to sleep at 7-7.30pm. I have to lay down with him in the day to get him to sleep as he will not stay in his bed and then he ends up having a late sleep and a late bedtime. I tried him not having a sleep but he was so tired about 3pm and upset so I know he needs a nap. Any ideas what I could try?