Rainbow Puddle

It's been raining like crazy around here and our cafeteria / gym is separate from our classrooms so every day on the way to lunch we wind around in a maze and try to find our way through the puddles. Today there was some gas or oil in a puddle and the kids noticed that there were colors in the water. One of them said, "Oh, I get it. That's where rainbows come from!" All the other students nodded in agreement. "It's a rainbow puddle."