Advertise! Create posters and invitations with the date, time, and location of the arts fair. To make 3-D posters, fold oaktag in half, horizontally. Draw your design wtih Crayola® Erasable Colored Pencils. Use Crayola Color Switchers™ Markers to color the background of your poster. Flip the marker and apply the special color switcher to print words (Come to the Neighborhood), draw maps, and add details.