It's a 'real life' version of the fantastic flying house in the movie Up and it was used it for the promotion of the movie.
I find it so really adorable... and would just love to see it in real life!
Here is a peak at how it looks from close up:
The hot air balloon reminded me of this video, which I loved a few years ago:
And this video, in turn, made me remember this Sony commercial - so pretty!
(This version doesn't have the original soundtrack, but it was the one with the best quality on YouTube)
I need to research a 'making of' for this commercial - I wonder if they really dropped thousands and thousands of balls down the streets of San Francisco!