Baby moving around in crib?

Gabriela • First time mom. 23. Due 06.26.17

My two month old moves so much in his crib, that I'll wake up in the middle of the night n his two legs will be coming out of the railing of the crib n he'll be sideways. Like how does he do it. Can it be the towels I put under the head of his mattress to elevate him?

Who else has this hAppen to you and how do you deal with it?

Thanks