Is it wrong?

Nuriana🎆 • One Ring to rule them all, One Ring to find them, One Ring to bring them all, and in the darkness bind them.
Is it wrong I want to tell my 7 yr old the truth about the Easter bunny and such because he's so badly behaved? It's not like I've been able to have fun with them anyways as it's become more of a punishment than reward. 
Before you all judge saying I'm doing something wrong we've gone to parenting classes, I've tried everything by the book and the school is finally testing him because he acts out in school too. He's amazing for babysitters and friends anybody that doesn't try to make him behave.