Personalized 3rd Birthday Party Cute Monster Youth T-Shirt. Cute monster and balloon for a 3 year old birthday party on a Youth T-Shirt - White boys or girls 3rd birthday toddler outfit Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.