Not really a student activity, but just an instructional resource that can be used as demonstrations or copied and pasted in desmos activity files you create.

https://teacher.desmos.com/activitybuilder/custom/5f554a089c56323f485e2f31

In this game, students are shown a simulated motion that leaves the trace of motion diagram, and then they are asked to adjust the parameters of a model to match the motion.

https://teacher.desmos.com/activitybuilder/custom/5f557fa7730a5b40cc090517