TWO baby orangutans (Pongo pygmaeus) are having a good time on the wooden boards, while others climb ropes, play on the swings, or plop their chubby bodies on top of their friends. They roll around on the ground, chase each other, and race up and down the ropes. One mischievous fellow gulps down cool water as it spews out of the faucet.

This is a daily sight at the Wana Riset Semboja facility, located in Balikpapan, East Kalimantan. These 12