I have a friend with a boy who's not yet 3 years old, and is in a high backed booster seat. He is average height and a little over average weight for his age (I'm not sure of the actual numbers), so I'm worried that he's in the wrong seat.
I did ask his mum about this, but apparently, he just will not go in a 5 point harness seat and will struggle and wriggle and unbuckle it. She says that this means he's actually safer in the high backed booster than in an age appropriate seat he will get out of.
Does anyone have any suggestions about what to do in this situation? I don't want to appear to criticize the mother, but I am a little worried for the boy. If I could make a positive suggestion to her, rather than just say it's the wrong seat (again), it might help!