There was a time when you only saw inflatable displays for Christmas outside department stores as part of their holiday display. Now, it is possible for anyone to own one, as they have come down in price considerably. You can buy them on the Internet, or at your local store.
When looking for inflatable displays for Christmas, look at the local stores first. If something should go wrong, you can easily return it, without too much hassle. Buying them over the Internet may cost you less, but all too often they are second-hand goods, and may not work when you receive them.
Common to all these displays is the electric motor used to inflate them. Make sure you have the room in your yard, and an accessible outlet to plug them in. During rough weather, it is advisable to deflate them until the storms have passed, to avoid damaging them.