You will need:
- Sheet of thick paper
- Bucket or big bowl of water
- Bowls of mixed paints
- Paintbrushes
How?
Dip sheet of paper into a bucket of water.
Remove the wet paper and place it on a table.
Dip a paintbrush into a bowl of paint and allow the paint to drip onto the paper.
Slant the paper from side to side allowing the paint to trickle over the whole page.