The Red Happy Birthday T-Shirt is a T-Shirt that can be purchased at Build-a-Bear Workshop.
Official Description Edit
Happy Birthday! Celebrate your special day with a Red Happy Birthday T-Shirt for your furry friend. This baseball style tee has red sleeves and a Happy Birthday graphic with balloons and a present.
The Red Happy Birthday T-Shirt is a white T-shirt with red sleeves. On the T-shirt there is a blue present, and attached to the presents are many balloons that are very colorful, such as blue, red, orange, green and yellow. There also appears to be confetti. Near the bottom left of this piece of clothing, a small red bear face can be seen.