any fabric you want (100% cotton) will work- pre-wash it with detergent- do not add fabric softener- or sheets when drying (you are removing additives- don't want to add them back in) color your designs---DO NOT IRON THE SHINY SIDE OF FREEZER PAPER-YOU WILL HAVE PLASTIC MELTED TO YOUR IRON---
use a brown paper sack and press (heat set) the designs- the brown paper (or newsprint) will soak up the melted wax- leaving the color behind. you can re-color, in layers to deepen the color...and if after time it starts to fade you can re-color, re- heat set....the local pre-school i volunteer at has been doing these for almost 11 years now. (the freezer paper is used (press the shiny side to the back of the fabric-ironing on the paper side) to give the fabric stability so it can be colored- after coloring-before heat-setting the freezer paper is peeled off and can be re-used a number of times.