A kaleidoscope is a toy that uses light and mirrors to make pretty patterns with symmetrical designs. Symmetry is when two or more parts of a thing are identical. Think of butterfly wings, matching socks, and spiderwebs —they all have parts that match. In this experiment, with a little help from Ziploc® brand bags, you’ll learn how kaleidoscopes use reflections in a mirror to create symmetry. When you spin the wheel, the pattern you see changes. Why do you think that is? Download the printable template here.