Personalized Worlds Best Biologist Toddler Sweatshirt. Buy a fun World's Best Biologist Toddler Sweatshirt - White as a gift for a biology major, biologist, biology teacher too. Great looking sports style logo in navy blue and tan. 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