Using the Egg-Box, allows for more challenging K'NEX sessions. These sessions are aimed at upper KS2 to early KS3 though even the adults find them a challenge! The Egg-Box is a neat, cost-effective device that allows you to control up to four K'NEX control motors by allowing you to input and play back a simple sequence of motor commands, such as "motor 1 clockwise" and "motor 2 anticlockwise", in a simple K'NEX model. Older children can build upon this ease of use to build and program sophisticated K'NEX models such as a robot arm, in which the two motors control arm rotation and arm raising/lowering. The ability to control more than one motor allows for many applications. In West Sussex, the challenge was to build Lunar Buggies which would steer around a given course. Other challenges have included building cranes that will lift a given weight through a given height and place the object on the table top (not as easy as it sounds)! The additional element to these sessions are the introduction to simple flowchart diagrams which again fit into the KS2/3 ICT and DT curriculumn. Adults and children alike find these sessions challenging and fun!