The Wheel: The Mother of All Inventions

When a school science project has her stymied, Shakira starts to wonder where inventors - like Thomas Edison - got their inspiration. Sam and Jen take the urban teen on a thrilling adventure through the ages to see how inventions are born and have the potential to significantly alter the course of history. If it hadn't been for the invention of the primitive "wheel," the locomotive wouldn't have been invented. Shakira figures, maybe when you get right down to it, the greatest inventor of all time wasn't actually Edison - maybe, just maybe, it was the caveman.