chalk marker chalk pen bullet broad dual nib dry erase washable fantastic chalktastic chalk pens & chalk markers have been developed and made for both children and adults to use and enjoy! the erasable chalk marker pens work just like dry erase markers and wet erase markers but are much more opaque in color use on: kids school projects and homework, glass, windows, plastics, base balls, kitchen units even use them on yourself!! great for halloween, 4th july, thanks giving, birthday, christmas decorations or any other celebration etc!! when your finished just wash away with a damp cloth or baby wipe etc! use on: whiteboards, non - porous chalkboards, menu boards, bistro boards, vinyls, ceramics, car windows, any non porous surface etc! always test on a small area first to check that the surface is non-porous and it wipes away ok