Personalized Cute Jellyfish Big Sis Toddler Long Sleeve T-Shirt. Cute big sister, future big sister, big sister to be Toddler Long Sleeve Tee - White with adorable, girly, kawaii, jellyfish with bows. For jellyfish lovers and sea lovers. A classic for Fall, Winter and Spring, these long sleeve toddler t-shirts are sure to be a staple in your child's wardrobe. Whether layered or alone, this t-shirt is soft yet durable enough to stand up to your toddler's playtime demands.