Personalized Tuba Nut Toddler Sweatshirt. An acorn nut holding a sousaphone is a humorous musical instrument gift design to tickle the funny bone of low brass musicians in concert, tuba choir and marching band. 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