Can't sit still and weird sitting positions

So I find myself siting in weird positions a lot a lot. When I'm at school I am always leaning back on my chair. A few times at home while I was watching tv I for some reason would move from chair to couch and sometimes stand up. That part doesn't happen often, the last time I remember doing that was when I was watching that movie American Sniper. also when I am on bed on my laptop (usually only when I'm watching a movie) I'll be sitting in the most bizarre position ever. My legs will be crossed in the air and I'm on my back. And even then sometimes I will keep moving into different positions. Is this normal??