LO is in preschool and they don't really have many rules for what they can't wear. I usually send her in leggings or sweats to keep it easy for the bathroom though, since she struggles with jeans...but lots of kids wear jeans. I don't send shoes that tie, for the same reason...I don't want her teachers to have to tie her shoes along with 17 other kids. So I just try and send her in easy items, but no official rules!