Problem: Helping my son-in-law to plan a surprise 40th party for a downtown Chicago gal. We need to keep at least 10 kids - toddlers to teens - occupied and happy, while entertaining the adults. The date is restricted to April 28th, a Saturday, in the afternoon or evening. We're looking at about 25 people. Could be more. We love good food, but we need to avoid keeping the little guys restricted to a dining room chair. I'll appreciate any guidance. I'm a suburban grandmother who hasn't a clue where to begin.