You know those really annoying fidget spinner-things that children are clutching lately??? I challenged the Seventh Graders to make one for themselves using the materials of their own choosing.
We watched a video of James Dyson talking about his evolution as a designer/inventor and another video of someone making a spinner out of air-dry clay (which I did not provide.) The children experimented with lots of different materials. Some of the spinners worked. Some, not so much!