I just received an email from Yenka announcing an additional 180 free resources. These can be played full screen and work well on an interactive whiteboard. These additions are from Absorb Physics for A-Level, and they were designed by the experienced textbook author Adrian Watt. The one shown here is the motorcycle jump.
You'll find the new resources here: http://www.yenka.com/freecontent/search.action;jsessionid=486AC75D7DE3D7A029FE1CEA02ACFB62
All of the 1200 free resources may be found at: http://www.yenka.com/freecontent/