I don't have kids, but I would think either the terrace level somewhere near the infield, or the diamond level along the right field line would be good. The terrace level has an area right behind homeplate with a play area with all kinds of tubes to crawl around in and ball pits and stuff... probably more geared toward younger kids. The right field diamond level has stuff more geared toward older kids like video games, places to try to outrun a Corey Hart Cutout to first base, Bernie's slide, virtual batting and pitching cages, etc. Also, don't know if you're committed to the 11th, but if you were able to make it on a Sunday, all kids 16 and under get to run the bases (with an adult) after the game. I've always been tempted to borrow someone's kid so I could run the bases also. Check out the Miller Park A to Z guide http://milwaukee.brewers.mlb.com/mil/ballpark/ballpark_guide.jsp#K Look under Associated Bank Kid's Zone, Bernie's Clubhouse, & Kids Base Run.