I have personally made this recipe dozens of times and even if you just keep the Playdough in a Ziploc bag, it lasts for forever! There is no reason to buy the "real" stuff. - 1 cup flour - 1 cup water - 2 teaspoons cream of tartar - 1/3 cup salt - 1 tablespoon vegetable oil - Food coloring (Tip from me: To make for more even coloring, add the food coloring to the water before you add the water to the rest of the ingredients).
Use a die cut door hanger and clothes pins and this is a great learning craft. www.accucut.com .....this is adorable but the weight of the clothes pins makes it hang weird. also not much room to write... either have to write on both sides or accept that the "Done" clothes pins will be upside down. Good idea. Just might tweak it so it's not a door hanger.