Personalized 50 F Word Toddler Long Sleeve T-Shirt. Fifty: the ultimate F word. 50 is a milestone birthday. Funny, humorous, sarcastic and witty! 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.