My toddler (2.5yo) has shown great interest in wanting a duvet/pillow for around 6 months now. She loves to play in my bed and pretends to go to sleep, puts her toys to sleep, puts me to "sleep" etc and I suggested maybe she might want to make the change from a sleeping bag to a duvet/pillow for her bed and she seemed very excited and keen. I bought the duvet/pillow, showed her how she should sleep ie not get in and out like when she plays in my bed and she went to bed fine, didn't get in and out but called me back after about 15 minutes and said she wanted her sleeping bag. I said that's completely fine but suggested she keep the pillow to start which she seemed happy about. She then called me back after another 5 minutes and said the pillow was too hot and didn't want it. I've asked her a couple of times if she wants to try it again, mainly for her nap so it's less pressure but she said no. She still sleeps in a cot bed with the sides up because she has never tried to climb out and also she moves about so much in her sleep I've always been worried she would fall out her bed. She is also the kind of toddler who winds up instead of down when she is tired so having the sides up just means she doesnt have the temptations to get out and play with her toys. She is an excellent sleeper so I don't mind so much about making changes but she is growing so fast and quite tall that she will soon be too big for the infant sleeping bags and she will have to sleep with a duvet/pillow. Does anyone have any advice as to how to help her to transition? I thought either putting the duvet/pillow away completely for a few weeks and not speak about it and then try again in the future or leave it it out and let her get used to it, maybe play with it a little? I'm a bit hesitant to go with the second option as we're quite strict with sleep etiquette ie no toys are allowed in the bed apart from her comforter and she is not allowed to play in her bed, it's only for sleeping. We also have a baby due in 2 months so I'm aware big changes aren't a good idea 3 months before and after something like this. Any thoughts?