Magnetic Whiteboard Lens and Prism Demonstration Set

Magnets are not strong enough to keep lenses from sliding down whiteboard

The kit itself is massive. Lots of lenses: positive, negative, one for teaching about total internal reflection, etc. The problem is they weigh too much to attach to our teaching lab's classroom whiteboard. We still have optical tables that we can use for a horizontal surface, but ordered them so that we could do the demonstrations in the vertical direction in front of a classroom of students. :( We will still get use out of them, but for the price it would have been nice to use our existing whiteboard.