Just that really...
DS still has the same duvet he used when he was in a cot. I think it's about 4 togs. We've just ordered him a new, bigger bed, and need to get new bedding to go with it. Do I get him a 10.5 tog duvet like I use at this time of year, or another 4 tog one, or something in between?
He'll be 5 in May. He's never complained about being cold in bed.