Gyroscopic fun at its best! Watch Newton’s second law in action in the most soothing way possible, you don’t need to study rotational inertia to enjoy this addictive spinner. Spin it on the tip of your finger and see how long you can balance it, spin them at your desk and see how many you can stack and spin at the same time. Master this awesome fidget toy and show off to your friends! 4 assorted colours – red, green, yellow, blue, sold individually. Product size: 7.5 x 7.5 cm