What is the movie title?

It was a Sci-fi movie. The few scenes are below.
1. There are two small round type UFO.(artificial intelligence robot)
2. They came down from sky.
3. They chose a building which is going to be removed from re-build.
4. The first floor is a restaurant.
5. The first floor is managed by a couple of old persons.
6. The one of UFO gave a birth in the rooftop.
7. The UFOs have three little UFOs.
8. In the end of movie, there are many UFOs to re-build the building.