This is a great idea from Parent Hacks.  When kids are helping with mixing and measuring, put the bowl over the open dishwasher door.  When you're done -- close it and the dishwasher wash cycle will clean up the mess.  Done.  Easy. Link.

I made weber_cam's No Knead Foccacia (video below) Sunday night for a big dinner we had with some friends.  Highly recommended, it was very tasty and extremely easy.  My only regret was I didn't shoot a picture to put here.  I'll give this another try this weekend...