Here's my 100th Day shirt. Each student created one as well and we celebrated the 100th day of school by wearing our shirts to school. Start with a blank t-shirt, any color is fine. Decorate the shirt with 100 objects. be creative....use paints, buttons, sequins, rhinestones, pom-poms, puzzle pieces, foam stickers, googly eyes, silly bands, pennies, etc. You can even create a pattern... to practice skip counting....I have 25 ladybugs that have four spots each.