That's great.
Sometimes, the school stuff can work. I remember going into my younger son's second grade class with a polarizing microscope and some rock slides. For those who don't know, geologists slice rock very thin, glue the slice to a microscope slide, then polish it thinner and thinner until you can shine a light through it. Polarizing microscopes shine polarized light up through the stage (on which the slide sits), and the stage can be rotated (it's marked in degrees, like a milling machine rotating table). As you turn the stage around, you can see the crystalline structure light up. I thought those kids would never get tired of looking through the microscope. They'd get their look and run back and get in line again. It was great fun explaining to them what's inside rocks.