This is a sort of silly question but it has been going on for a while now but I am just curious if anyone else's kid does this. My four year old spends quite a bit of time thinking. Like thinking is its own activity. It takes two forms. One is a sort of pacing/skipping in a circuit around the room or yard while thinking and the other is a lying around thinking. He doesn't talk to himself while he does it. He is always able to articulate what topic he is considering if I interrupt to ask. He isn't sad. He actually seems happy to get lost in his own head. It is just that lately I will ask "Do you want to (insert activity)?" and he'll respond "no thanks, I just want to think" and off he'll go.