"How about 18?" asked Glen.
"Sure." Sam replied.
"Ok." Glen entered his new age and pressed enter. "Nothing's happening," he said
"well, you set the change time to 3 minutes, mayb-" Sam was cut off as Glen started to get taller. His muscles became defined as his crotch are pushed out. His face grew some stubble as his features became more sculpted and masculine. He finally topped out at 6'2" with a fair swimmer's build. He was actually 18!
"Wow, I'm awesome!" Glen said as he heard the mailman. "Huh? I got a letter from Yale!"
"Cool! you better take the Chronivac," Sam said, "You can bring it back after you're bored with college and we can change some other stuff."
"Alright, I'd better pack then..."