We have the same problem too, but last week we slept in our camper and it was so so cold, that DD actually snuggled under the doona, arms and all. She normally falls asleep under a sheet or a light blanket but wriggles her way out and when she's in bed with us, she ends up lying sideways on our pillows to avoid the blanket touching her. So I was quite relieved to see her all snug and warm under a doona.