What can you buy......

Again, I'm being tongue in cheek but kids latch onto anything. That on his belt will be a great thing to torture him for.
It'll be clipped inside his bag man, not hanging from his waist :lol:. He won't be bullied, he's the type of kid that if a child tries to fun fight, he assumes it is a real fight and then will fight because he weirdly enjoys a tussle.

Simply tell him not to lose it or he has to walk until he saves enough pocket money to buy a new one?
Surely he is capable of taking it in and out of his bag when needed ?