How Charlie proved to be lucky to the family?

In Chapter 30, Wonka says how much he loves his chocolate factory and asks if Charlie loves it, too. Charlie says it is the most wonderful place in the whole world, and in response, Wonka tells him he is giving him the entire factory as a gift as soon as he is old enough to run it. Grandpa Joe and Charlie are astounded, but Wonka explains that he is getting older and has no family to take over the factory when he is gone. He sent out the Golden Tickets so that he could find an heir.

Wonka directs the elevator to the Bucket house to pick up the rest of the family, since they will live in the factory from now on and help to run it until Charlie is old enough. The elevator crashes through the roof of the house, and Charlie rushes in to tell everyone what happened. The grandparents initially refuse to go, but Mr. Wonka, Grandpa Joe, and Charlie push their bed into the elevator along with Mr. and Mrs. Bucket. Charlie tells them they are going to the most wonderful place in the world. Grandma Josephine asks if there will be anything to eat there since the whole family is starving. Charlie laughs and tells them to wait and see.