Personalized Let The Shenanigans Begin Toddler Long Sleeve T-Shirt. Funny St. Patrick's Day Toddler Long Sleeve Tee - White with shamrocks says says Let The Shenanigans Begin. Perfect for St. Paddy's Day parties and Irish parades. 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.