Trash Collector

My son likes collecting receipts.   He's been taping them to his bed frame,   Only special ones, with some selection process known only to him.   He also has this taped to the side of his dresser (it's empty).   We are under no circumstances allowed to remove it.   And no one knows why. 

The Big Boy Update:  My son will be a fifth-grader in two days.   How is this possible?  At all?   I swear, he was just toddling around in diapers.   

The Tiny Girl Chronicles:  In a little less than two weeks my daughter is going to be a fourth-grader.   That also, cannot be possible.   No way.   She was just learning how to stand.