Personalized Monkey Future Big Brother Toddler Long Sleeve T-Shirt. Future big brother Toddler Long Sleeve Tee - White with an adorable little boy monkey holding a banana. He says I'M GOING TO BE A BIG BROTHER. 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.