Designed for young creative builders ages three years and up, Bankers Box at Play Cardboard ABC/123 Learning Blocks make learning and playtime even more fun. Featuring 50 lightweight, large (3" x 3") blocks with five different colors and 10 designs, kids can expand their imagination while strengthening their motor and organizational skills. Each block includes a variety of images on each side, including numbers, letters, animals, objects and mathematical symbols, so children can enjoy building tall towers while learning new words, matching, counting or spotting their favorite animal. Blocks are made from durable, lead-free corrugated board (F963 Standard Consumer Safety Specification certified) and finished with kid-friendly rounded edges to deliver years of safe fun. The blocks are easy to assemble but require adult assistance.