Little Man Computer

The Little Man Computer of the Learning Technology Development Unit at The University of Hertfordshire, that I used in the past for introductory courses to computing, is now available from CAS (Computing at School) webpages.

You will have to register as a member of CAS, but this is free and designed to ensure access is restricted to users engaged in education.

Another Little Man Computer animation is available from GCSEComputing.org, but that one might not have the same appeal for younger pupils.