What are some creative ideas for a cat/dog house?

My mom and I are going to build and paint a house for our one dog and three cats. We would like each of them to have their own compartment. We are going to keep this in our garage so that in the winter they have a place to sleep. (My mom doesn't want them to stay inside since they shed and my sister is learning to crawl)The thing is we don't want to make some ugly, non-creative box. NO it has to be something unique! We had a few ideas, a barn, a Victorian house, the White house. Do you have any ideas? Something fun? It can be anything it could be a rocket or anything! Thanks(;