Sweet P LOVES coffee filter crafts - we've made the Earth, pumpkins, trees, umbrellas, snowmen and Valentine snowflakes this year! So, of course, we had to have a St. Paddy's Day Coffee Filter craft as well.
We use a dropper to distribute the colored water, but it could also be painted on. I used 2 different types of green food coloring - neon and regular, and also did a blend of yellow/blue for variety. You can see how the two colors separated on some of the coffee filters.
Check out this collaborative Pinterest Board for more St. Paddy's Day fun!