Marbling paper (and a little silk) with shaving cream and food coloring

I will demo this simple method of marbling on both paper and silk, and then you can experiment with color mixing and different ways of swirling the color on the foam.

Payment: For this demo, I'm only seeking reimbursement for supplies, so we're using a "suggested donation" model. I estimate materials will run about $3 per person, so bring a few bills, please. (If you forget, you can just buy me a cup of tea sometime.) You do not need to pay ahead of time for this particular activity.

THIS CLASS IS OPEN TO BOTH MEMBERS AND NON-MEMBERS. PAY ON SITE.

About this craft:
It's fun and easy to make beautiful marbled paper using shaving cream as a bed and swirling in food coloring. This craft is a popular one to do with children, but why should they have all the fun? This is a great way to make an additional kind of paper for book covers, collage, ATCs, decoupage, and more. I think you will find that the effects can be quite interesting!

I will also prep small pieces of silk for dyeing by soaking the silk in vinegar solution and then letting it dry. After marbling, you can set the color with an iron. I'm bringing small wooden frames, really more like mats, that you can use to display the marbled silk. Maybe hang it in a window?

What to bring:
A couple of old towels (important)
Optional: an old metal cake or brownie pan, or cookie sheet
Optional: smooth paper and/or smooth cardstock (not textured paper). (Colored paper is fine, by the way, if not too dark.)
Optional: shaving foam and/or food coloring, but avoid heavily scented shaving foam. Barbasol is especially bad for people sensitive to scents.

I will supply:
Food coloring, palettes, pipettes, shaving foam, foil trays, smoothing tools, swirling tools, and plastic bowls for excess shaving foam, plain old copy paper, silk, little frames from Dollar Tree.