The changing Boots

There was a little boy in Kindergarten. He cried, so the teacher asked him what was wrong.

He sobbed, "I can't find my boots."

The teacher looked around the classroom and saw a pair of boots, "Are these yours?"

"No, they're not mine," the boy shook his head.

The teacher and the boy searched all over the classroom for his boots.

Finally, the teacher gave up, "Are you SURE those boots are not yours?"

"I'm sure," the boy sobbed, "mine had snow on them."