What age do toddlers usually have pacifiers or dummy's?

made my children give up their dummies at about the age of 18 months, it was always xmas time and said that they had to leave them for father xmas, and in return he would leave them some presents. think it looks horrible when you see 4 and 5 yr olds walking round with them in their mouth. and frank s spelt, spelt wrong too, its not spelled, its spelt, know it all, not