It sounds like you're preparing for a fair, so it's great that you want to be as ready as possible! One question that immediately comes to mind is why you chose to call the project "Where There Is Charge, There Can Be Sparks!" Of course, it's the title given by ScienceBuddies, but why did you think it was a suitable, appropriate title? Other questions I would ask are:
1. What makes your project stand out? Why is it unique? (This may actually be easy to answer, since most kids usually do projects on plant growth or detergent. But you chose one of the lesser done ones!)
2. Why are you so interested in your topic? What is your inspiration?
3. What is the significance of your results? In other words, why does the project matter and how do you think it relates to daily life?
4. Do you plan to build on "Where There Is Charge, There Can Be Sparks!" in the future? If so, what are some next-step questions you have in mind?
Granted, these are just a few of the questions you might actually be asked. As Rick Marz noted, it's best to ensure that you know your project inside and out and have a firm grasp of each concept it employs.
Hope this helped,
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