One of our favorite art supplies, these neon markers make writing on glass, chalkboards or even paper a great experience! Vibrant against any surface, the creativity is endless with these markers. Neon Chalkables write on porous and non-porous surfaces, making the possibilties for different surfaces endless. Liquid chalk is easily erasable with water and a mild cleaning wipe or solution, too. For first time use, shake the marker and press the tip down for about ten seconds. Markers measure approx 5.75" tall.