I would like to add one more thing is the fast
foods at school should be avoided by all children. Eat more of natural
foods, which is good for youngsters.
And children who are overweight can start walking to school, (if it is nearer), cycling, walking to the grocery, walking in the neighbourhood, using TV buttons instead of remote and stuff like making you move and work all the time. This is enough for children combined with some sport.
Come back to us with further queries, take care!