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 – 25 years ago this month. The Lab was a single HyperCard stack. Click on the image to see a larger version.
Here is the same experiment in today’s desktop 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.