The people who put on Art-a-Whirl claim it’s the largest open-studios event in the United States. 3-Minute Egg certainly won’t argue the point. It’ll take us three Eggs this week just to give a slice of the Art-a-Whirl life. Our series begins with stops in the Grain Belt and California Buildings. Look for more Eggs from Art-a-Whirl 2009 Tuesday and Wednesday.