Just that really. I have a two year old, who no longer sleeps through because he gets cold in the early hours. His room temperature fluctuates between about 13 and 17 degrees Celsius. I put him to sleep in a long sleeved vest, sleepsuit, extra thin sleep sack and a toddler duvet. Apprehensive to pile on too many blankets in case of suffercation / overheating. Have also read electric blankets and hot water bottles aren't safe until age 5? Anyone got any tips??