OCD??
Lines, lines, and more lines. Tony always puts his toys and other things in a line. He'll ask me to come play dinosaurs, animals, cars, the list goes on. Most of the time we'll play for a couple minutes and then he'll put them in a line and he'll tell me not to touch them. I have teased him once or twice, to see what happens.... "no, mom they go right here" he'll say.
Me: "well, don't you want to play dinos?"
Tony: "We are, lets play"
Still not allowed to move the animal out of line.
I came into the room the other day to find pillows in the line. A little OCD you think?