I bet the gang-master owner of the sweatshop that made the fakes is happy, too.
Never mind the misery endured by the victims of the enforced labour that created your fake, as long as your son is happy, then all's right with the world.
What you really should do, and I think many on here will agree with me, is smash the fake lump of shite to dust with a sledge hammer. I'm sure your son would understand… but then again