My DD is 4yo and still has a dummy at bedtime.
She used to have one in the car but that stopped recently when we moved her into a 'big girl seat'. There was a little moaning but nothing too bad.
However, she has several dummies at night and I absolutely know she will be devastated (not forever) when we take them away.
Has anyone had success with allowing a child to give up dummies at own accord? What age?