Add Perception Semispheres to your teaching tools and ignite children's imaginations. Set of 8 sensory Perception Semispheres measuring 2 dia. come in eight different clear colors and feel smooth and warm to the touch. The very youngest children will enjoy handling them in free sensory play or as part of a treasure basket collection. Older children will find them fascinating as they hold them up and look through to see the world around them in different colors. When a hemisphere is placed on top of an object it magnifies it by 4 or 5 times to give a view that is both a different color and enlarged. Holding two or three Perception Semispheres together creates new colors and hues; using the Spheres on a light panel will enhance the children's opportunities for color mixing. These spheres can be cleaned with a mild soap and water mixture and a soft. damp cloth. For children ages 3 yrs. +.