Retro 100th Day of School Teachers Kids.Happy 100 day of school, cool and great 100 days of school costume for kindergarten, preschool, middle school, elementary school , first grade and for students or teachers, men, women, kids, boys and girls, mom, dad. Retro Happy 100th Day of School design. Makes a fun present for students and teachers to celebrate 100 days of school. Celebrate being 100 days smarter in this 100th day design! School party outfit. Holiday present idea. 100 days of school celebration. 8.5 oz, Classic fit, Twill-taped neck