Darell Hammond from KaBoom! building playgrounds

The story is short and great: Helping Out: His life is a playground (or 2,000 of them):

Founder and chief executive of KaBoom, a nonprofit that builds playgrounds in communities.

Charitable giving highlights: The nonprofit has built nearly 2,000 playgrounds, raised $200 million and galvanized 100,000 volunteers throughout the country and internationally.