Sunnyside had to play two crucial roles in the film: a warm and welcoming environment one minute, an oppressive prison lockdown the next. Either way, the Pixar artists had to make Sunnyside always appear as a credible day care center. The crews took field trips to various child-care facilities in the Bay Area where they identified patterns in the organization and structure of bins. It also proved valuable in getting the child’s perspective. “Being there is great," said production designer Bob Pauley, "because you notice, wow…that chair’s tiny. Those toilets are tiny.”