Alfie grew back on his own, without the ray.
He grew bigger and bigger and bigger and bigger and bigger, and older and older and older. as that happened, his toddler clothes ripped off his body. With a sudden pop, his little round belly popped out.
Alfie had turned from a two feet tall 4 year old naked toddler into a naked 30 year old 5'8 burglar. His burglar clothing reappeared on him.
he considered using the ray to change himself again.
He mulled over the possibilities:
For age: he could regress or progress in age again for a disguise. after all; Every burglar needs a disguise.
For size, he could grow to the size of a giant, and stomp around. he could smash buildings, cars and trees at the size of a 50 foot giant. Being gigantic would make him unstoppable! OR he could shrink to small sizes - to doll size, to ant size, and he could make sneaking around a whole lot easier, since no one would notice a small doll-sized burglar. Being tiny would be cool! of course, He always wondered what it'd be like to be extremely tiny. He especially wondered what it would be like to be nearly microscopic.
he could also swap bodies with one of the cops, to see what it was like to be on the other side of the law.
he could become a female woman, or he could gain extra muscle!