From plastic bottles of shampoo do so-called spray. To do this, the tube is necessary to drill one or more holes. Now, when we click on a bottle filled with water from these holes will beat the jets of water. These jets are very good at drawing on dry pavement. You can come up with incredible songs that immediately, upon drying, will disappear. You can write your name if certificate is already mastered. Or you can on a hot day - and spray each other (unless, of course, the water entering from puddles).