I have the blimp from
Plantranco. It is about 4' long and 3' high. It works well indoors like a
house or gym but at a trade show I took it to in Houston, the air currents
proved to be too strong for it.
My daughter Amanda tests flies the blimp first.
Then I was allowed to have some fun too.
Finally, we used it at a trade show in Houston. The blimp was tethered to the booth when not in use. I removed some of the clay weight to make it rise. We had some stickers made with our company logo for each side of the blimp.