Ducks when they are very young imprint on their mothers, meaning they recognize their mother as the one they should follow and have take care of them. Interestingly enough, ducks can actually imprint on other animals such as dogs as well as people.
My idea is to make a baby duck imprint on a remote control car. Then you could drive it around, and the duck would follow. This could be used to have remote control duck races, where an RC car is driven around an obstacle course, showing the duck where to go. Imagine an indoor RC car track, filled with ducklings running around. Now who wouldn’t pay to see that?