These washable, tempera paint filled brushes are fun and shaped to make it easy for small hands to use! The paint is in the brush, so there’s not set-up or messy water jar. These paint pen brushes are great for painting rocks plus school and craft projects, posters or any type of painting activity. When it’s time to stop painting, just recap—no bristle washing needed. They can also be re refilled with tempera or acrylic paints. Safe and non-toxic formula.