My twins are now 6 months old, born 8 weeks premature and have been sleeping in their carseats from about 3 months due to acid reflux, my bigger twin is now 16 pounds and the smaller is 14 pounds, they are getting really long and they just look really uncomfortable. Right now they have colds, which is why Im kinda hesitant about moving them. How can I make it easier for them to go into a crib when they dont like to lay on their back. Is there any easy way to get them to transition to their crib? Any advice would help greatly, thanks!