They are fireworks without the fire. They produce sparks with such a low temperature that you can put your hands in them and feel nothing!
This makes them ideal for events like Christmas Lights switch-ons in town and city centres where audiences can watch in completely safety from only a few feet away.
They come in two forms: 5 metre high fountains that spray up columns of silver sparks which can be programmed to dance in time to music; and as revolving wheels producing swirls of sparkling silver.
Have a look at this video sample to see cold sparks in action.