We just put up decals in the nursery: http://www.amazon.com/Carters-Forest-Friends-Wall-Decals/dp/B0076USUQS/ref=pd_sim_sbs_ba_7?ie=UTF8&refRID=0R9KE8XD4PKZ0YFQ5W8P
They're cheap, but really give the room a nursery feel. I also am hoping once the kid is a bit older, he can run around naming all the animals and such!