Jake doesn't love having his diaper changed. He's too curious and eager to play to sit still for something so six-months-ago. Sometimes when he's being particularly difficult and needs some distracting while his mom changes him, I will set the blocks on his face as quickly as he can take them off. It seems to upset him much less than the diaper changing, and while he doesn't exactly revel in block-to-face game, he treats it like a math problem.
I'm sitting here watching Jacob "play" with his blocks, which right now consists of placing them on his own head until they fall off. He is not smiling, but rather looks like he's working on a math problem.
It will be interesting to see what psychosis this develops into. (I'm kidding, psychologist joke)