My teammate and I both love physics and math and wanted to learn how basic simulations work in our first hackathon. Though it isn't a simulation(more like a calculator with steps), it became the foundation to so much more and also hold educational values by explaining steps for Projectile Motion, Friction, Dynamics, etc
Example: Let's say you wanted to find friction(simple example), you would put it in your coefficient, mass, etc, and get your answer. Now let's say you wanted to find the coefficient, you would put it in your Friction and mass to get your answer.
Disclaimer: The video became compressed and therefore the explanation is lacking due to small font size, sorry about this.