This is a fun craft activity that includes a bit of science. Each student will need a coffee filter. I like to label each filter ahead of time with the student's name written in permanent marker. Create a solution of water and blue food coloring. Only a small amount of water is needed. Have each student use eye droppers to drop the blue solution onto the coffee filter until is is completely blue. Make sure to have something under the coffee filter because the food coloring will bleed through. When the filters dry, prepare another solution with green food coloring. This time fold the coffee filters into fourths and dip each corner into the green solution. Open the filters and allow them to dry. I like to mount them on black paper and have the student add a few gold stars. We also write a way to help the earth and mount that to the paper too.