D.K.
I saw on that TLC show Jon and Kate Plus 8, a mixture of honey, peanut butter and powdered milk a great recipe of edible playdough. She put a little flour in it to keep it thicker but seems like a great idea for kids that eat it!!
Look up the recipe too for playdough on the internet that is made with flour, I don't remember it but it is fun, just not very good for them to eat much of.