Today on a field trip to an art store we had a demo on how to do
marbelizing with Stabilo colored pencils -the CarbOthello brand. They
were wonderful!!! So easy, less mess, non-toxic. The kids loved it
(middle school). All you need is water for a floating base. The pencil
tip is rubbed against sandpaper over the water and the powder floats on
the water. You can use regular white construction paper. The pencils
are not cheap, but if you way the cost and the mess of the liquid
starch, it seems worth it to me.