I have a button and it lights up when you push it (it flickers). My BF turned it on and put it against my stomach and the baby moved closer to it. Then he put it on the other side and you could see the babys arm or foot poke on that side. It looks sooooo funny to see something poking out of your belly. Has anyone else discovered this? Ive read they baby's can see outside the belly but i never thought it was true.