Saw this easy way to create mandalas at Art Walk. I may just need to try this with some of my students.
Using card stock, acrylic paint, a cake topper or other plastic stencil, you can have a lovely mandala in a very short amount of time.
Start by tracing a circle. Then drop 3-4 drops of 4 different colors of paint anywhere on that paper. Fold the paper diagonally then open. Repeat with the opposite side. Fold it across horizontally, open/repeat until the paint is well distributed.
Using another color, stencil a pattern on top of the mandala and add a center gem.
For an impermanent version, they had mandalas you could make in sand with twigs, shells, stones and other objects then take a picture of.