Beside the school bag, we have to teach them how to well organize their books, exercises, snack box, water kettle, wet towel, stationeries and raincoat....
At the begining, the sweeties would like to bring all the stuffs to make sure they didn't miss. They don't think they're in Primary school, they still thinking they're in "K4"
It's better to teach them the right way carrying their school bag and tide to their body.