Stack them up and knock them down. Playing with the Knock-Knock Blocks from the Small World Toys IQ Babies collection are just the thing to keep your busy baby occupied. These soft-stuffed fabric blocks are perfect for little builders. The set features 16 blocks, 8 colored ones and 8 with contrasting black and white patterns. Some blocks have peek-a-boo windows and doors, and others crinkle and rattle. There's so much to hold your baby's interest, these blocks will keep your little one coming back for more. The blocks are surface washable and come in a vinyl storage case with a handle. Details:MulticolorEach block is 3'' squarevinyl storage bag measures 13'' x 3.5'' x 11''Blocks make crinkle noises and other blocks rattleSurface-washable fabricDesigned for children 0 - 36 months