DS1 has been in grobags from 3 months and they really have been a godsend. Thing is he is now 26 months and would like to get him to use duvet or sheets/blankets. He wont entertain the duvet at all - " get it off mummy". He likes the big blanket I got for him but now tries to sleep with it on top of his grobag! He just loves his grobag to bits and whilst there is still a bit of room left in it there will come a time when he grows out of it. Any tips on how to get him moved out of it, and anyone else's toddler the same?