This is ICDL's official DIRĀ® Floortime Training Series. The USB includes the complete set of 3 manuals, accompanying videos, and an extra bonus video. This is the original series developed by Drs. Greenspan and Wieder that features them playing with children, coaching parents, and providing feedback and suggestions on using Floortime.
The DVD versions can also be found on Amazon while supplies last (typically at a higher price).