A tornado is air which is spinning very fast. It is made by a special type of thunderstorm called a supercell.
Fill up the container with water then add a few drops of the washing-up liquid and a few drops of the food colouring. Tightly screw on the lid.
Swirl the container around in a circle lots of times and then stop. Inside you should see what looks like a tornado. It will slowly disappear as it reaches the top of the container.
Tornadoes in the real world are made in a similar way, when cold and warm air combine and spin.
There are lots more fun weather experiments that you can do. Why not try one of these:
Last updated: 20 February 2015