"Mom! Mom! Look at this! There's a pulley inside here. You see? And you pull the floss, and then it has this thing over here, which is kinda like scissors but you don't have to snip. You just pull and...Snap! Presto! You have a piece of floss! Isn't it amazing? It's got simple machines inside."
"That really is amazing! I'm glad you like flossing so much."
"Yeah, cause a pulley is a simple machine. And look, you stick it in your teeth and wiggle it, and it's kinda like doing the wedgie dance in your teeth."