Children use pacifiers to settle down and go to sleep, but they don’t use it at all the rest of the day. The only problem with this is that then children truly associate their pacifier with falling asleep, and they almost can’t fall asleep without it.
You can break this association, and it is better to do abruptly, rather than try to limit the time your children are using the pacifier. You’ll have two or three bad nights, and then the whole thing will be over. For children of about two or three years, It is recommend that you pick a date, and tell your children that they are going to stop using the pacifier because they have become big now. Remind them a couple of days beforehand, and again the day before.