Reactor Lab is a pioneer in developing interactive simulations for active learning. This is a screenshot of an experiment in the Lab in March 1993, when the Lab was a single HyperCard stack. The screenshot was taken after it was converted to a LiveCode stack to keep it alive and operable on today’s computers. Click on the image to see a larger version.
Here is the same experiment in today’s Reactor Lab.
A brief history of the development of Reactor Lab through 2006 is available at LiveCode Journal. The article refers to Revolution, which was LiveCode’s previous name.