You will need:

* Carbonated water

* Revolving cake stand

* Scissors

* Tape

* Salt

* Tall drinking glass

Step 1: Place the at the center of the revolving cake. Fasten it securely with tape.

Step 2: Now pour carbonated water into the glass until it is nearly full.

Leave a small space at the top.

Step 3: Spin the cake stand, and pour a dash of salt into the glass.

Watch the tornado form. You can repeat this as long as the water remains

fizzy.