Posted by: Pattie Beaven, Elephant Keeper Chai playfully balances a boat bumper on her head. Photo by Ryan Hawk/Woodland Park Zoo. Our elephants have a number of toys, or, in zoo-speak, Environmental Enrichment Devices (EED) that are designed to bring out their instinctual behaviors, along with all the naturally enriching elements in their exhibit like trees, logs, leaf piles, water and different ground coverings. The elephants have quite an array of EEDs, and one of their favorites is a boomer ball, which we often fill with treats. But constantly purchasing more boomer balls (since the elephants can be a bit destructive with them) can be a little costly. So, what’s a zookeeper to do? We think outside the box, er, ball. With a background working with marine mammals, I thought back to my days of playing with dolphins. We would throw boat bumpers and buoys in with the 800-pound critters, and play endless games with them. So, how would an 8,000-pound animal react to one?