The Snatcher: Ten No More

Feeling frustrated, Jon clutched the stone again. "I wish I wasn't ten years old." As the stone glowed, he realized his mistake. He should have wished to be his normal age again. But instead, he wished for an age other than ten years old. The stone could make his age almost anything now! After the flash from the stone dissipated, Jon hesitantly looked at himself. What age did the stone make him?