In The Brain

We were listening to the Christmas music radio station this morning.

"You're a Mean One, Mr. Grinch" came on and we heard the phrase, "Your brain is full of spiders."

Me: Do you have spiders in your brain?
Matt: No.
Me: Oh, you...
Matt:(interrupting) I have toys.
Me: You have toys in your brain?
Matt: Yeah!

Tell me something I don't know. :)