Mix 1 cup flour, 3 teaspoons baking powder and 1 teaspoon salt. Add water until you have a lump-free batter the consistency of pancake batter.
You will need thick paper (we used watercolor paper) that fits in your microwave.
With 3 kids, I used 3 cups. There’s enough to divide into 4 as well. Put a Ziploc bag into each cup and divide batter evenly. Add food coloring as desired.
Zip the bags closed and let the kids gently mix the color in. Then snip off a tiny corner, and let them paint. Keep lines thin and use thick paper.