Behind every great genius was a great rival - an unstoppable adversary whose incredible vision, determination, and ambition is their match. Out of their struggles came the world's most brilliant inventions, the spoils of the heated battle between competitors.

In the 1950s and early '60s, a small band of high-altitude pioneers exposed themselves to the extreme forces of the space age long before NASA's acclaimed Mercury 7 would make headlines. Though largely forgotten today, balloonists were the first to venture into the frozen near-vacuum on the edge of our world, exploring the very limits of human physiology and human ingenuity in this lethal realm.

Over 2000 kids. 400 teams nationwide. Eight months of brainstorming, designing and building. One goal: to create the next great toy.

Behind every great genius was a great rival - an unstoppable adversary whose incredible vision, determination, and ambition is their match. Out of their struggles came the world's most brilliant inventions, the spoils of the heated battle between competitors.