There are plenty of expensive kaleidoscopes on the market. You don’t have to spend a fortune to experience amazing patterns. Take the GloFX Liquid X Kaleidoscope for instance: it lets you combine dual liquid-glitter filled wands to see mesmerizing patterns.
As you turn the toy, the oil moves, leading to new colors and shapes created. The GloFX Liquid X Kaleidoscope is pretty easy to put together with 4 rubber spacers.