hair gel, food coloring, glitter - my kids LOVE these! Make sure you put tape or something over the zipper side of the bag! We had problems with leaking after they were played with for a while. :) Hair gel and food coloring
Helpful tip to aid in learning to fill the lines. Show by drawing on paper first, then hand out sticks- and kids learn how to draw a cat :) Learn with Play at Home: Clever classroom trick for kids learning to write in the lines.