For one such miniature, of an irregular log climbing frame for the Washington school, Mr. Heuken's team used straws and pins.

WSJ: Creating: Peter Heuken, Playground Designer

The outdoor climbing frame, built by the army, is the largest man-made structure for apes in the world, and will encourage the chimpanzees' natural curiosity and intelligence.

BBC: Exotic chimpanzee enclosure opens

They leave their mark on bridges and underpasses, invade abandoned buildings to gain access to the top floors and scale skyscrapers by climbing from one window frame to another.

CNN: Wall art masquerades as class war

Though his graying head reveals his age, he's kept his 5-foot-5-inch frame in remarkable shape, climbing rocks and fishing like a madman.

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