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Nat Sims is the CEO and cofounder of Night & Day Studios. The company develops arts, education, and entertainment apps for iOS, Android, Nook, and the Kindle Fire. He has been a content developer and interface designer for over 20 years, creating educational software, interpretive plans and exhibits, curricula, graphics, music, and games. Nat has designed over 50 iPhone and iPad applications in the last three years including the best-selling Peekaboo Barn, Eric Carle's My Very First App, and Caillou's World. Night & Day Studios has international licenses for many major children's brands including The World of Eric Carle, Richard Scarry, and Yo Gabba Gabba!, and is currently collaborating on projects with publishers HarperCollins and Penguin Young Readers.