Personalized Stays In Preschool T-Shirt. T-Shirt - Light Blue for back to school with colorful, funny saying and hand prints. WHAT HAPPENS IN PRESCHOOL STAYS IN PRESCHOOL. Perfect for kids and teachers! Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.