Personalized Math Jigsaw Toddler Sweatshirt. Math spelled with interconnecting jigsaw puzzle pieces is a fun gift design for birthdays, holidays, graduation and back to school. Keep your little one cozy and stylish with this soft and durable toddler sweatshirt. Designed for comfort and ease of movement, it features a classic fit with ribbed cuffs and hem for added warmth. Perfect for everyday wear, playtime, or chilly outings, this sweatshirt is made to withstand the adventures of an active toddler