What kind of other engineering and design related content would you like to share?
Tutorials, CAM ..
Why not add something more on rendering and presentation of models.
As to how to give professional touches to our renderings, how to setup and tweek various materials, and one can add photoshop and illustrations in their renderings, etc........
Why not host an online seminar for different softwares, for example: 3 hour seminar on how to make basic renderings in Solidworks. After the 3 hours they should have basic knowledge and improvement is much easier!