Summer Reading Program

Every year our local library has a summer reading program we participate in. The goal is to read the number of hours of your age and then up to 20 hours for different prizes. Aidan read 20 hours in about 6 days and they all met their age goal the first week. They all got these fun shirts and their picture is hung in the library. How many pictures does it take to get a good one of 3 kids?........if you find out, let me know!