Jar Melo's colorful chalks, especially designed for outdoor use, provide an unlimited painting experience for our little artists! It is easy to wash away or wipe off. Contains 24 bi-coloured pieces of chalk and 2 holders. Designed for children and toddlers to grip easily, and it's non-toxic & washable. The chalks could be used on chalkboard, driveway, pavement, playground, street and wash off easily.