Question for the Mother's

Alright so Joel has been sleeping pretty well the only thing is that he will not sleep in his crib! We are not sure why he does not like it. The main place he will sleep is in his car seat so we put a fleece blanket in there and lay him on that and then of course put a 2 blankets on him (and put the blankets under his arms so he can't throw the blanket on his face). Anyway are there any tips on getting him to sleep in his crib? If you can leave a comment do that, or you can email do whatever is easiest! Thanks!!