A hypnotic display of light and sound that spins science into art. The 3"" diameter chrome-plated steel disk will spin faster and louder the longer it rotates. Just give it a spin and gravity does the rest. Includes Disk, 9"" concave mirror base and 9 pieces of holographic, magnetized foil. 6 disks included per pack.
• Age Grade: 8+
• Product Dimensions/Weight: L x W x H / lb 3"" diam disk, 9"" diam mirror
• Batteries not required"