Laughter is contagious, and this orangutan is getting a kick out of something! As it turns out, she's part of the Think Tank exhibit at the National Zoo in Washington DC. Here Bonnie, Batang, and pals can play along with zoo visitors and not just pose for photo ops.There's a button for the apes to spray human passersby with water to help beat the heat  and a way to play tug-of-war as well. Are you ready to join in the fun?
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