A paintbrush named Brushy who secretly creates whimsical artwork at an art school during the night. The plot reaches a turning point when the community faces a crisis regarding an unfinished mural intended for a local festival. By revealing his magical abilities to a student, Brushy encourages a collaborative effort between the magical tool and the children to complete the project. The story serves as an educational tool to teach young readers about the six primary rainbow colors and the value of artistic expression.