Another one of our evening enrichment puzzles is putting nuts, peanut butter or mashed up banana into holes in kongs. The chimpanzees use their fingers or a tool (or a combination of both) to get at the tasty treats inside, but sometimes the treats can be pretty tough to get out.
Jamie spent the better part of the morning working on her kong that was left over from the previous evening. Evidently, there was a hazelnut that was trapped inside and she could not free it. She tried using all the tools at her disposal, including her finger, her tongue, the arm of a troll doll, and a short wooden tool. When none of them worked I offered her a hard plastic chop stick to use.