It's normal for kids to grind their teeth. This is a common concern/complaint from parents (I work in a pediatric dental office). Nothing you can really do. They will grow out of it...usually it will stop when the 6yr molars come in...if not before. If you are super concerned...contact your dentist to see what they may recommend.

Mine does that too!! But it's off and on...

My grandmother used to wake me up to drink water and then make me use the bathroom. No idea why.

Probably a phase my son used to do that. He stopped about 3 years ago. Hes 10 now

Omg! My son does that to..

My oldest did that until she was 5 and stopped on her own