Sometime we can get out of ideas. Let us share with you some links :

Middle School Science Fair Project Ideas:

https://www.education.com/science-fair/middle-school/?fbclid=IwAR1EEhhQ90c1CV03nhlRoo1VH2MopXBuSKIwr1hZhJhk0xitJtjnvZqAeJc

Industrial Designers Society of America:

http://www.idsa.org/education/how-they-do-it?fbclid=IwAR2hFVwpP6lenbj12U4K_qZYGwI7Wj4HsvOVzIlDLCHnJaivI1Ui3vwNHW0

Create and View Your Own 3D Models in Virtual Reality:

https://www.sciencebuddies.org/science-fair-projects/project-ideas/Games_p033/video-computer-games/create-and-view-your-own-3d-models-in-virtual-reality