Personalized Cupcake 3rd Birthday Youth T-Shirt. Happy 3rd birthday toddler! Celebrate your little girl's third b-day with a pink bird, party balloons and a 3 candle atop a cupcake. Happy birthday three-year-old! 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.