Set of 8 sensory Perception Semispheres measuring 2" dia. Includes translucent clear, red, orange, yellow, green, blue, pink and purple pieces. Feeling smooth and soft to the touch, the very youngest children will enjoy handling them in free sensory play or as part of a treasure basket collection. Holding two or three Perception Semispheres together creates new colors and hues; using the Semispheres on a light panel will enhance the children's opportunities for color mixing. Ages 5 and up.