Stacking builds fine motor skills, spatial reasoning, and other developmental skills. Add a personal touch to your baby's first set of stacking blocks with this set of 4 photo stacking blocks by CP toys (#jcl-22l). each block features a clear vinyl pocket on each side. Customize them with pictures of family, friends, or pets to enhance your baby's Learning experience! these blocks are lightweight and safe for little ones ages 12 months and up. They are made from cloth-covered foam. These stacking blocks are easy clean and surface washable - simply wipe them down with a damp cloth. Includes 4 blocks, in Blue, green, red, and yellow. Each block holds 6 photos and measures 4.25" x 4.25" x 4.25.".