A lot of kids join when there about 8 + any child can join. whether there a handmedown, or etc.
I'm not sure of the brand but it was probably nice because it was most likely a handmedown of Dudley's! But in the seventh book Harry get's a cool wizards watch for his 17th birthday
In Eclipse? The Wolf Figurine is meant to symbolize Jacob in his wolf for and he says so that he is always on her mind and its a little part of him the diamond heart from Edward is a handmedown to symbolize his cold stone unbeating heart and that in shines like him in the light.