This past weekend, Kathy Hirsh-Pasek and her research partners hosted New York City children for one of the world’s biggest play dates. Held Oct. 3rd at Central Park’s Naumburg bandshell in Manhattan, the Ultimate Block Party brought out more than 50,000 children and their parents to play hide and seek, build robots, create with Lego bricks, and pretend to be ship captains and princesses.