They can be used in a project to make a projection TV, using a small 14inch CRT.
I think they also need the large mirror too or then image is backwards, its a DIY project.



I find most people have a weird attraction to lenses and magnets. As soon as they see some they want to pick them up and play with them.
My fridge is a good example, its covered in magnets of all sorts.
That's the first thing some go to when they see them, and start playing with the ball bearings or screws stuck in a pile on some. Forming them into different shaped lumps by hand.
Seeing how far away they can get them while still under attraction and invisably moving others.

Picking up a football sized lump of hard drive magnets.... Ah, the 'unknown'....

Swearing when they get their finger caught.