We had so much fun with this activity. First we soaked a couple sponges in a tub of water. The kids drew their own targets on the fence with chalk. Then, they took aim and threw the wet sponges at their target. They problem solved the best angle to throw the sponge so it would stick to the fence. This is great for hand/eye coordination, problem solving, fine motor skills, large motor skills, not to mention, a fun way to stay cool on a hot day (it didn't take long before the kids were using each other for targets). All in good fun, of course!