My 5 year old DS who has always been brilliant at going to bed has suddenly started messing around for hours after bedtime. He’s not just in his room- he’s running down stairs, going in to wake his 8 year old brother, hiding in random places etc. He watches hardly any TV, does plenty of outdoor activities etc so nothing obvious needs to be changed in terms of lifestyle. Anyone else who has been through this? How do you deal with it? It’s driving me insane. Short of holding his bedroom door handle closed for hours I can’t think of a solution!