Outside In: Video and Supplement (NTSC version)

This award-winning video visualizes the discovery that a sphere can be turned inside out by means of smooth motion if self-intersection of the material is allowed. Stunning computer animation combined with thorough explanations in the spoken text and the accompanying four-color booklet, Making Waves, classify this film as "educational entertainment." "The technical work could hardly be improved upon." -- James M. Kister, Mathematical Reviews