Marc Tickle is behind some of the coolest teleidoscopes we have tested. The Disco Dandelion is pretty special though. It is a large teleidoscope with 4 tapered reflective surfaces, including a dichroic mirror, to create psychedelic imagery. It measures 13-1/4″ long by 2″ in diameter. It has crystal spheres inside that move as you tilt the scope up and done.
By adding more lights on the side and around the scope, you can create even cooler patterns.