I have a 3 yr old and a 7 month old,and i just took his dummy away around march and my yougest still had hers,i just told him the fairies had to take it away for little babies and that i couldnt see his beautiful teeth with the dummy in his mouth,he didnt like it very much but just took it away anyway he cried for a while then fell asleep etc asked for it a few times the next day or so then just forgot about it,but taking it away altogether done the trick,i know its hard but has to be done!!! He'll get over it,just stick it out