I had to do a lot of thinking about this one. What was Craver thinkig about when he came up with this one? We have a college in my town where there is a lot of thinking being done. So I thought how do you think? Well, you think with your brain. Here is a sculpture on campus of a big brain.
You should be able to do a lot of thinking with a brain this size.
See what the others show on my sidebar.