The more Jon thought of it however, the more he reallized that it would be a mistake to tell Karyn about this wish. She might get all over him about it and he will never be able to have any fun with it.
So when Karyn came by to walk with Jon to school he kept the secret to himself. In fact, he even went so far as to say into the rock, "I wish, that if I ever use my 'gimme powers' Karyn will never suspect that the stone and I are the cause of the changes, unless I decide that I want her to know"
Jon grinned. Karyn would never know