Put them in a jiffy bag and send them to the Budongo Trail chimp house at Edinburgh Zoo.The keepers enrich their lives by hiding their food in old socks, T-shirts, pillow cases etc so that they have to work a bit harder to find and extract it. They are fed at random times, too, and the rest of their food is not presented to them in a nice tidy bowl but scattered among the bushes in their enclosure. In the wild they would spend a lot of their time searching for little bits of food, so it makes it more natural for them.
Holes in socks quite acceptable!
This link is about Budongo Trail Chimp enclosure and the Budongo Conservation Field Station in Africa which is supported through Zoo gate money
Fifty years ago, there were probably a million chimpanzees living in Africa. Today, chimpanzees are an endangered species, with as few as 150,000 left in the wild.