uhhh yea it is, you usually do them on tops of quarters and whatnot
let him learn what he wants
anyway, all i do to do them is just bring my bars just a wee bit up, step on my brake and balance. not much to it
and if the quarter your doing it on is slippery it could not be good haha
it's not even a trick...
focus your time and energy learning cool tricks like barspins, tailwhips, etc...