And I mean, when did they learn how to cover themselves up with a blanket in the crib/in bed to stay warm when they are sleeping?

My son is 22 months and we're going kind of crazy because whenever the air conditioner is running, he either wakes up or starts rolling around, gets very restless in his sleep. We have to keep it SO HOT in our house at night (we live in Florida) that we're not sleeping. He is already in pretty warm socks/pj's. We can sometimes sneak in and cover him up once he's asleep but that usually only lasts an hour or so before he rolls over and kicks the blanket off or whatever.

It is a strange problem but I'm not sure what to do about it! He used to sleep in a sleep sack which handled things, but a few months ago decided he was DONE with it.