Go into a shop with you and just stand next to/near you, fairly still ish for about 5 mins?
I know grown up shopping is a bit dull for a four year old, but needs must sometimes. And my son is constantly moving away/around, touching things, etc etc. I'm trying to work out if this is something I should be worried about.
At school he is apparently perfectly capable of standing still in a line and in lessons. In shops this just goes out of the window!