This black t-shirt features a playful mathematical design, perfect for a 7-year-old's birthday. The graphic displays a square root symbol over the number '49,' cleverly expressing the age. Below the math equation are the words 'YEARS OLD' in a matching white cartoon-like font with a black outline, creating a fun, eye-catching statement. Made from a comfortable-looking fabric, this tee is ideal for casual wear, birthday parties, or as a humorous gift. Show off their love for numbers with this unique and memorable t-shirt!