Personalized 2nd Birthday Boy Outfit Submarine Adult Sweatshirt. Cute submarine with number 2 for a toddler boy celebrating his second birthday party. Stay warm and stylish with this classic adult sweatshirt, perfect for everyday comfort. Crafted from soft, durable fabric, it features a relaxed fit for added coziness. Whether you’re lounging at home, running errands, or enjoying outdoor activities, this versatile sweatshirt is a wardrobe essential for any season.