Webots MOD consists of a series of 3D robot models which you can buy individually and program in your favorit programming language. Note that if you want to simulate several instances of a robot model, you will need to purchase several instances of the same model. New: all robot models come with a large library of objects and environments.
Example 1: you want to program a simulated Thymio II robot using Aseba to avoid obstacles. You need to purchase a Thymio II Aseba model (total: CHF 19).
Example 2: you want to program in C++ two simulated DARwIn-OP robots playing soccer (in a one versus one game). You need to purchase two DARwIn-OP C++ models (total: 2 x 69 = CHF 138).
Whenever you reach a total amount of CHF 320, your Webots MOD license can be converted to a Webots EDU license and you will be able to use all the robots without any restriction.