You will need acrylic paints in various colours; plain white coasters (ours are from Bed Bath N’ Table); newspaper or drop sheet; paintbrushes in various sizes.
ONE Mix a small quantity of paint with a little water to thin it out.
TWO Place coasters on newspaper or a drop sheet. Wet your paintbrush with the paint. Flick onto the coaster. To achieve different effects, try different sized brushes, or a combination of flicking the brush and using your finger to flick the tip of the brush towards the coaster.
THREE Let dry for 10 minutes before applying another colour.