RICHMOND, Va.--(BUSINESS WIRE)--CarMax, Inc. (NYSE: KMX), the nation’s largest retailer of used cars, announces today the launch of a new, $5 million partnership with KaBOOM!. The CarMax Foundation and KaBOOM!, a national nonprofit organization dedicated to giving kids the childhood they deserve by bringing play to those who need it most, have successfully provided 100,000 kids across the nation with access to play. This partnership aims to triple their impact by reaching a total of 300,000 children by the end of 2018. To celebrate the official coast-to-coast launch of the partnership, more than 400 volunteers will simultaneously build two new playgrounds today, April 7, in El Cajon, Calif. and Fort Worth, TX.