WHAT SUPPLIES DO I NEED?
-oil pastels (if you are buying a new set, I recommend Crayola - those "suitcase kit" oil pastels are often sub-standard and act more like crayons)
-pencil
-white drawing or construction paper, 9x12
-black or very dark construction paper, 9x12 (only need one to two half-sheets of that)
-for day 4: watercolor paper (highly recommended), or very heavyweight white paper -but watercolor paper is highly preferable, as the effect with oil will be superior to the effect you get on heavyweight drawing paper or printer paper. Oil tends to soak into those.
-paper towels
-toothpicks or something similar with a somewhat pointy or scratchy edge (eg a skewer, a coffee stirrer, a plastic fork)
-q-tips/cotton buds
-a small amount of oil (baby oil, olive oil, any kind of cooking/kitchen oil)

Oil pastels can be messy! Although I'll be discussing ways to try to minimize mess, it's a bit inevitable. You may wish to put down some kind of table covering, and have a trash can nearby.