Use on Kids School projects and homework, Glass, Windows, Plastics, Base Balls, Kitchen units even use them on yourself! Pick up Chalk Markers 8 Colors With Bonus 24 Chalk Stickers for just $7.99 (Reg. $19.99). Shipping is free w/ Amazon Prime or a $25 or more order. This one is from Amazon and keep in mind that price can change at any time.