New idea, make a few of those shirts and take a picture every year with each of the shirts, that way the kid will have the option to graduate early or stay behind a year (or two)
Oh My God you guys. Kid grows up normal, graduates on time. Has a great photo gallery of said shirt. Goes on to college. Discovers the cure for cancer and brokers world peace. Let's have some hope or we're all doomed.
Okay let's build a time machine and fix that t shirt.
"Dammit you stupid kid!!!"