Most of the mandalas on this site are drawn, but every so often, I'll post one that uses patterns that I draw and reflect using a kaleidoscope filter just because I like how it looks. In this case, the effect above and this one-
use sine curves at varying widths in regular intervals. I liked the effect so much that I thought you might enjoy some coloring pages using the same technique. Click on the images for large versions.
Small JPG version: