face painting class

I have a family that wants to hire me to have a face painting party. Where I would teach kids ages 8-up simple painting skills. How do I do that? How much do I charge per child? How do I set out the paints for them to use? Is there a way to take a portion on my paint and put it in a different container so they can all of a small portion? Any help is appreciated.

Here's an option:
Have some little paint trays like this:
https://smile.amazon.com/Paint-Palettes-Plastic-Professional-Painting/dp/B074W56CQ4/ref=sr_1_1_sspa?s=arts-crafts&ie=UTF8&qid=1534770721&sr=1-1-spons&keywords=paint+tray&psc=1

Buy a few colors and divide them into the paint tray. I would recommend pink, red, white, black, light green, dark green, blue, and yellow. Teach double dipped flowers and leaves plus a few simple designs (balloon, cherry, heart, pumpkin, lightning bolt, teardrops, swirls, etc.). Show how purple can be made from blue and pink or orange can be made from yellow and red. I would think each child should have a liner/thin brush and a bigger brush round brush, maybe a 4-5. Charge maybe $25 per kid for 6-8 kids for 1 hour.