My son (age 2) just started to refuse the sleep sack, which he has been using since 9 months old. He has a blanket in his crib but is on the smaller side. He uses it more as a lovey.
How should i keep him warm at night now? Should I get him a bigger blanket? Crank up the heat? Put heavier pajamas on him?

How do you keep your toddlers warm at night?