<<Disclaimer: Verify this information before applying it to your situation.>> > Play-dough does not contain flour. It is made from baking soda. In the UK, the commercial product Playdoh is 50% wheatflour if memory serves me correctly. When I was a child playgroup made play dough was made from flour (this was the UK and 30 years ago - things may have changed since). I'm not sure what you mean by baking soda - do you mean bicarbonate of soda / sodium bicarbonate. I don't think this would make anything like a dough if mixed with water. Baking powder (bicarbonate of soda + acid (citric) plus a filler (often flour) might well do. Tim