My 3yr old is still sleeping in her cot and am worried that it might cause issues later on. I have left her there for so long as she has never once tried to climb out and seems so happy in it that I didn't see the point. It is a cotbed so big enough for her to be comfortable and she sleeps so beautifully all night long that I am scared to move to a big bed in case it upsets her. Anyone else got kids older than 3 still in a cot?