Harry chuckled a little, remembering how his dad and mum had regressed. "Yeah, I really wanted to meet my dad, but I think we should wait until everyone has grown back up. It would be a little strange to see him right now, especially since Mum is fifteen and still hates him at that point in her life."
Harry was glad he had missed out on the age regression thing himself. His younger days were, in some ways, more miserable than his teenage life. He did not have fond memories of the Dursleys or his days before Hogwarts. Why would he want to go back and relive all that?