Open Hanging Ball

(Danielle Fogarty – Chicago Zoological Society/Brookfield Zoo)

Hard plastic jolly ball is cut open at one end. 3 holes are drilled to place 3 pieces of chain that are connected at the top. Device should be hung outside of an enclosure, on a bracket or similar structure where it is out of reach by hand. Orangutans must find a tool to push it with until it swings close and can be caught. Tool used to extract food at bottom as well.