KaBOOM! Founder and CEO Darell Hammond, First Lady Michelle Obama and the Honorable Arne Duncan celebrate the building of the organization's 2,000th playground at Imagine Southeast Public Charter School in Washington. D.C. The First Lady, Members of Congress and more than 500 volunteers joined KaBOOM! and Knight Foundation to build the 4,000-square foot playground in less than eight hours. (PRNewsFoto/KaBOOM!, Toby Jorrin)