Fark linked up this story on an interesting new method of enrichment (no, I don't live with a former primate vet tech... why do you ask?) for one zoo's chimpanzees:

At the zoo's new Regenstein Center for African Apes, chimpanzees can touch a panel hidden from public view that will shoot harmless bursts of air at unsuspecting visitors.

Hours of fun for apes of all ages!