Nap Time

My son has started to tell us when he is ready for his naps. Yesterday he took 2 naps and both times he was in his room playing, and started to cry. So I went in there and he is trying to climb into his crib. So I picked him up, laid him in bed, and he was out within 5-10 minutes. Has anyone else had this happen with your children? I think it's great that he did that, lets hope he continues.