How does disney collaborate with pixar for theme park merchandise?

The provided sources do not contain any details about how Disney collaborates with Pixar for theme park merchandise. The Wikipedia entry for Walt Disney discusses his career as an animator and producer but does not mention partnerships with Pixar or merchandising strategies. As a result, there is no evidence to describe the collaboration process or any joint product releases. For accurate information, consult official Disney or Pixar press releases, corporate reports, or reputable industry publications that cover licensing and merchandising agreements.