1.5 cups flour
3/4 cup salt
1 TBSP cream of tartar
3 TBSP vegetable oil
1.5 cups water
food coloring (optional)
Mix the dry ingredients. In another bowl, mix the wet ingredients.
Combine the wet and dry ingredients. Stir.
Cook the ingredients on the stove over low heat stirring constantly until
the texture is like commercial playdough.
Store in a air tight container.
I don't believe you can purchase this book anywhere other than through the Children's Museum of Boston, so here is another possible book that come highly recommended from some friends. It's called the Toddler Busy Book. It looks to be very similar.