Rob began to grow.
He started to grow bigger and bigger and bigger still.
He was worried that he would outgrow his house, so he pressed his belly button again, and he stopped growing.
His slacks and socks had somehow or other grown with him. He grabbed his shirt and tried to put it on. It was way too small.
He looked like a genie in a waistcoat too small for him.
"Hmmmm." He said, staring at his belly button. " it seems that my bellybutton lets me change my size, and any items of clothing I am wearing when I change my size grow or shrink with me."
He looked at his short-looking shirt. "I guess any clothes I am not wearing don't change size when I change size. Impressive." He said.
With that, his belly button gained a new feature - the ability to shrink himself as well as grow himself.
Rob set his belly button to 'shrink', and one press of his button shrunk him right down to normal size.
What next.