This was a project from 2009, admittedly more Dad than Colin's creation, but not entirely. It's Carl Fredricksen's house in the Pixar animation "UP".
Important details include the garden hose that is used to pull it along when it was floating above the rain forst mid-movie, as well as the front gate and mailbox. Depicted is Carl and the little boy who stows away, Russel. We had a lot less mini-figure parts back then so accuracy for the characters wasn't as good as it could have been. Most tricky was figuring out how to do the balloons of course.