My son learning

My son is only 3 1/2 months old. He has already learned to roll from his belly to his back and tries his hardest to get from his back to his belly. He can scoot an inch at a time whether it be on his back or his belly, and in his walker can move backwards. How can he do all this at 3 months? We have prayed that he is strong, plus not to mention the fact that his name means strong gift from God. This is something I have been learning as I go with. I have been learning to pray for what I want or need and it eventually happens. We pray for our son to be strong, and he is so strong that everyone around us doesn't believe us half the time that he is already doing things that most babies don't start doing til they are 5 months or older. I just pray he actually crawls before he walks!