N.W.
A.,
My son did the same thing when he started crawling, and again when he started walking. I would sometimes give up and let him play (I know that's not the solution you're seeking). Anyway, it is totally normal and usually, at least in my case, passed within 2 weeks. If he can jump out of his crib-- you should consider a toddler bed. Otherwise, consider putting a few toys in there (nothing soft) for him to play with when he gets up.