Looking for a clever birthday gift for a 10-year-old? This 'Square Root of 100 Years Old' t-shirt is perfect! It's a fun math joke (square root of 100 is 10, get it?) that kids and adults will appreciate. Made by Classy Canuck and printed in Ontario, Canada, this tee is 100% preshrunk cotton with a classic loose fit that's comfortable all day. The design is printed crisp and clear with direct-to-garment printing, and it won't crack or fade easily. Shoulder-to-shoulder tape and a seamless collar give it that quality feel, plus double-needle stitching on the sleeves and hem for durability. Care is easy - just turn inside out, machine wash cold, and tumble dry low (don't iron the design directly). Available in multiple sizes from S to XXXL - check the size chart in the images to get the right fit since sizing can vary. Whether it's for a birthday party, a fun school day, or just because your kid loves math (or funny jokes), this shirt is a hit. It's one of those gifts that gets a genuine laugh when it's unwrapped. The 10th birthday only happens once - make it memorable with this clever tee!
