Personalized Whatif Monster Birthday Boy Adult Hoodie Sweatshirt. There's no day like your birthday, so why not try something new? Whatif Monster Birthday Boy Adult Hoodie Sweatshirt - Black, perfect for little fans of "Jonathan James and the Whatif Monster" by Michelle Nelson-Schmidt. Elevate your comfort with this classic adult hoodie, a perfect blend of style and practicality. Crafted from soft, high-quality fabric, it features an adjustable drawstring hood, and a spacious front pocket. Ideal for layering or wearing on its own, this hoodie is a versatile staple for casual outings, workouts, or relaxing at home.