Nice find! This seems like a pretty fun way for children to travel through the airport, and especially if the kids are too tired to walk, anyway. I guess I might also like an adult size one but that suitcase would be huge... haha

I guess one concern is if all of this would fit in the overhead storage, the extra wheels and rod may take extra space

It's definitely a unique idea that honestly does seem kind of silly, but those kinds of ideas can also be a lot of fun.