Jeff decided being a kid again would be fun, so he decided to become a 10 year old boy.
Selecting the template, and making sure there were no issues with the preset options, Jeff clicked the "ENTER" button. A window popped up that said "NOW INITIATING REALITY CHANGE."
Jeff looked up to see that he wasn't in his room anymore, he was in a different one. It had posters of cartoon characters and toys all over the place. It looked like the bedroom of a kid. Suddenly, Jeff's clothes disappeared, except for his underwear. Jeff watched as it changed into a kid's pair.
All of a sudden, the physical changes began. Jeff began to shrink. He stared at his legs as they got smaller. They weren't as long, and the hair was sucking into them. Jeff watched as his feet began to get smaller as well, his foot cracking as it shrunk, his toes becoming stubbier. Jeff could feel his manhood shrinking too, as his pubic hair sucked into his regressing body. Jeff was going back through puberty, and the muscle on his arms dwindled away. His pecs shrunk into his body, and his chest became smaller and boyish. His hands shrunk like his feet had. Jeff's hair elongated into a longer boy's haircut. His hair turned from dark black to light brown, and then curled on the ends. What facial hair he had vanished, and his jaw became less defined. His skin became softer, and his skin tone became a bit darker.
Jeff's clothes suddenly reappeared, and Jeff watched as they shrunk to fit his new body, his shirt becoming a kid's T-shirt and his pants morphing into shorts. His shoes reappeared on his feet, now sneakers.
Jeff was now a 10 year old kid, ran outside to the playground.