My kids are 2.5 (still in a cot but she can climb out, we normally zip her sleep sack on inside out to keep her in for safety reasons) and 6 months and they need blankets to sleep ie won’t sleep if they don’t have them on.
it’s like 29 degrees in their rooms, will they be ok with a 0.2 and a nappy? They’ve both got 2 fans, ones a cooling one, not blowing directly on them but circulating air in the room.