This is a beautiful physics toy designed for your desk. A vortex lives in here, just spin the gorgeous glass dome to see it!
If you spin the top, it starts to slide and tip over. If you spin it fast enough, it will turn completely upside down, spinning on its stem.
This elegant perspex spinning top has a spindle that is magnetic. This allows a most intriguing action to occur.
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...