My son was four last month he has a diagnosis of autism and learning difficulties ,he is going on a trip with nursery to a farm next week and they want to put a/wrist strap on him because they are afraid he wil wander off the thing is I have have never had to use reins or a wrist strap and we walk up and down a busy main road three times a day taking older Ds to school younger D's to nursery pickups etc when I stop he stops and he is too scared to let go of my hand even when we go shopping he walks around holding my hand .I could understand if he was a bolter but he isn't ?