We have been there! For our 3 year old's birthday, she had to give the dummy to the dummy fairy. She placed the dummy in a bag and then hung it on the tree in the garden for the fairy to take. The fairy took the dummy and left a number of presents. We had a few sleepless hours but she finally worked it out and now laughs at her baby sister and keeps telling her that the dummy fairy will be coming soon to collect her one!. Please tell your friends/family what you are doing, so you all stick to the same story!