I had the big girls chop up bacon and taught them how to cook white sauce for pasta, using roux, a cooked mixture of butter and flour.
For the small kids, we made our own play doh using a very good recipe given by Hughie's school. It incorporates cream of tartar to make a very soft and pliable dough, unlike the tough and elastic dough of just water and flour.
Anyways, the kids had lots of fun getting messy with flour, then rolling out and cutting shapes to create their masterpieces.