It's never too early to start teaching your kid about astronomy, the quadratic formula and general relativity. These genius baby socks will help your little scientist get off on the right foot with math, planets and Einstein socks. These socks feature a seamless toe construction, which means no annoying toe seam to irritate your kiddo's sensitive feet. Two sizes: Age 6 to 12 months fits baby shoe sizes 2 to 4, while Age 12 to 24 months fits kids' shoe sizes 3 to 7. 63% cotton, 34% nylon, 3% spandex. Made in China.