Moving inflatables are ideally suited to attract people's attention. A WavyTube is an inexpensive way to do this with a relatively high attention value. They can be ordered in a stock color, or with text and logo.
A WavyGuy, but with two legs, instead of 1. Because they use two blowers, they can be ordered in heights of 30-35 ft tall, and can even be used as an entrance to events, by having people walk between the legs.