Two ball bearings welded together, an LED torch that slowly morphs from one colour to another when you switch it on, and a small straw, all packed in a smart presentation box. Welcome to Tornado Spheres!
Place the ball bearings on a smooth surface and give them a spin with your fingers. Then use the straw and blow to one side of the spinning ball bearings, which will cause them to spin faster.
Then switch on the LED torch, and watch the fascinating light show!