DIY Rainy Cloud in a Jar Magical Rain Cloud in a Jar – A Fun and Educational Weather Science Craft Recipe (Craft Instructions) Materials Needed: 1 large clear glass jar or mason jar Warm water Shaving cream (white, foamy kind) Blue food coloring (you can mix in other colors too!) A small bowl A dropper, pipette, or spoon Directions: Fill your clear jar about three-quarters full with warm water. This will represent the air below the clouds. Spray a thick layer of shaving cream on top of the water