What if my printer could print money -- how would it change the world? Is it actually so dangerous to go swimming in a thunderstorm? And, what would really happen if everyone in the world jumped up and down at once? In his book What If, XKCD artist Randall Munroe tried to provide genuine answers to questions like these -- questions that often come from kids and that leave adults stumped. In this special interactive session just for kids, Randall will use his expertise as a Thing Explainer to try to answer audience members' burning questions on whatever topics come to mind.