Personalized 21 on the Rocks Toddler Sweatshirt. A large number 21 held up by three happy rocks and the text, on the rocks, is a funny birthday design for twenty-one year olds. 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