Rob began to shrink.
He started to shrink, smaller, and smaller, and smaller still.
He was worried that he would shrink down to nothing, so he pressed his belly button again, and he stopped shrinking.
Rob guessed he was now approximately toddler size.
His slacks and socks had somehow or other shrunk with him. He grabbed his shirt and tried to put it on. It was way too big now - he looked like a kid in his dad's shirt. Looking at his hands, he saw that all he could see were sleeves.
He took off the oversized shirt, and stares at his belly button. "Hmmmm." He said, " it seems that my bellybutton lets me change my size, and any items of clothing I am wearing when I change my size will grow or shrink with me."
"And," He added, upon putting his huge-looking shirt back on, "I guess any clothes I am {b}not{/b} wearing don't change size when I change size. Impressive." He said.
With that, his belly button gained a new feature - the ability to grow himself as well as shrink himself.
Rob took off his shirt again, then set his belly button to 'grow', and one press of his button grew him back to normal size.
What next.