He is a model airplane and tank builder, Boy Scout and Yu-Gi-Oh! enthusiast. Now, Andrew Gieseler is something else: a role model. While walking to the door of a Super Target store in Warrenville on Saturday, Andrew, 12, found a plastic bag stuffed with $9,000 on a deserted stretch of sidewalk. A routine trip to buy sneakers to accommodate his growing feet suddenly became exciting and mysterious. He picked up the bag and read the two white stickers on it, one specifying the amount; the other stating the bill denominations. "We could see it was money and I said, `What...