The humans are minor characters in Oobi.
The humans appear in interview segments along with the puppet characters, as well as in the series' end credits. Most are preschool-aged, though several adult family members appear alongside their children. The humans generally answer questions asked by a main or recurring character. The only episode in which humans appear outside of an interview segment is in "Chopsticks!" (in which hand puppets and humans are visible in a photo of China).
The humans' physical appearances vary. They are all much taller than the puppets.