100th Day Of Smarter Teachers Kids Dino Dinosaur 100 Days Of School T-shirt. 100th day of School. Perfect for a boy, girl, kid or PreSchool teacher who loves to celebrate this very special day. Happy 100 Days Smarter - Happy 100th Day Of School Gift. Celebrate being 100 days smarter in this cute 100th day shirt! Hip Hip Hooray Happy 100th Day of School! Cute rainbow costume gift for students, teachers, men, women, kids, boys, girls, daughter, son, granddaughter, grandson, grandkids, toddler, child. Lightweight, Classic fit, Double-needle sleeve and bottom hem