The Houston Astros offer an outstanding program for kids with Perfect Attendance. Information about this program can be found here. There is also an Honor Roll program for academic achievers. I'm told by teachers whose schools have participated in the program it is an outstanding motivational tool. Click here to download the enrollment form for you school in PDF format. According to their website:
The Perfect Attendance program is designed as a motivational tool to applaud your students and provide enjoyment with the Houston Astros at Minute Maid Park! Also, each school's Perfect Attendance coordinator will receive coupons good for tickets to their choice of pre-selected Astros Perfect Attendance game dates during the 2005 season as our way of expressing our gratitude for their leadership and teamwork.