DD goes in Grobags at night but has recently been showing great entusiasm for our duvet. She's a tall girl and I need to either get some 3-6year grobags or a duvet - I'm opting for a duvet, but not sure what tog to get. Would 4.5 b ok? That's obviously much thinker than her winter grobag (2.5 tog) but I guess she could kick it off if she got to hot? Should I get a pillow too - do they make thin ones for children?