Coloring water bottles is not "arts and crafts." It's about making children realize that creativity belongs to daily life. A water bottle is one they use on a daily basis at school, playing sports, or at home. By coloring it, they take pride in a useful item that they have created themselves.It also makes them feel they own it: instead of some generic bottle, now they have something that is personal to their style and personality. This instills confidence and individuality.