Yellow Socks for Purple Monsters

A young boy with a newly found and mysterious door under his bed. A young monster with a similar door in the the ceiling above his head.
A trap is set. The bait is taken. And each is ever more curious as to what (or who) is on the other side. Momma may say "No" or "it's nothing important", but the need to know is too great. Each child must know what lies behind the door.
2 young children; one monster, one boy, discover one another and their amazing worlds, thanks to a yellow sock, lost - then found.