The Wimmer-Ferguson Mind Cubes is collection of 4 soft and lightweight fabric-covered foam cubes with a combination of tactile and visual stimulation in the form of ribbons and high contrasting numbers, letters, animals, shapes, and patterns. Collectively that is a whopping group of 24 sides of goodness for baby to stay engaged. Wimmer-Ferguson toy graphics and designs are based on scientific research of visual development in early infancy. Suitable for all ages.