1) A kaleidoscope creates symmetrical patterns using multiple reflections of colored objects in mirrors inside a tube. It gets its name from the Greek words for "observer of beautiful forms." 2) Typical kaleidoscope designs use three rectangular mirrors arranged at 45, 60, or 90 degree angles to produce different numbers of reflections. Rotating the tube presents the viewer with changing color patterns. 3) Sir David Brewster invented the first kaleidoscope in 1817 while experimenting with light polarization. Modern kaleidoscopes come in varied materials and object chambers can be filled with liquids.