+1 on the photo setup if you don’t have one already. Having a really good camera, a couple softbox lights, and a backdrop set up and able to be used at any time has been really useful at work. Not only do pictures of our final models look great, but it’s really easy to have professional looking photos of everything along the way. And it should cost much less than $10,000 so you’ll have plenty left over for something else.
3D printers would be great if you don’t have them already. I think they help designers work on both form and function and help push their 3D modeling skills. Just make sure the students don’t think their hotshots for knowing 3D printing - it’s not really that hard (at least the usual stuff) and at least for now it doesn’t replace knowledge of mass manufacturing processes.
The desktop injection molding machine sounds great, but I worry that it will take too much upkeep and expertise, besides the cost of molds (which 3D printing can help with, but probably not a sub $10,000 3D printer). If you have a shop manager or other staff member who’s excited to take it on it could be cool though.
The electronics set is also a great idea, and also not terribly expensive. You could make a pretty sweet station for $10,000, and for those who are into it it would be a big help.