Celebrate a 12th birthday with this unique and eye-catching black t-shirt! Featuring a square root of 144 design surrounded by intricate math equations and symbols, it's perfect for the budding mathematician or any child turning twelve. The design offers a playful, humorous twist on the traditional birthday shirt. Made from what appears to be a comfortable and breathable fabric, this t-shirt is ideal for everyday wear, birthday parties, or math club meetings. Make their special day memorable with this fun and educational gift!