First, you're going to cut the front or back section from a paper bag. If you don't have a paper bag, use white construction paper. This will be your cave wall.

Next, crumple and uncrumple the paper, working it with your hands until it feels soft.

Then, fill a bowl with several inches of water. Dip a tea bag in the water or add coffee grounds to give the water a brown color.

Next, dip your paper in the water. Then, hold it gently over the bowl, letting the excess water drip back into the bowl.

Last, lay your paper flat to dry. Save the paper for Day 2.

Take out the paper that you saved from your cave wall on Day 1. Choose what you will be painting on your cave walls.

First, lightly sketch the outline of your drawing in pencil.

Then, use a permanent black marker or black paint to outline your sketch.

Last, finish painting your cave design. Lay your painting flat to dry.