my DS would move all over his cot. normally he is sideways... at the very end of one end.
He never keeps any blankets on him either.

The funnest one was when I went into his room, and his legs where through the bars of his cot - sticking out... If you hit the photos link (in my siggy below) - you will see photos of him on the first page (at the bottom).

I've put him into a 'big bed' in the last couple of weeks (he's 16mo).. and he manages to stay in the same position, with a blanket on him. Wierd.