Enough water
1 pot

(Note: A pot is somewhat similar to a cup in shape, but larger and usually made of some sort of metal. It frequently has a long handle as well.)

Put water in pot. (Pot must be large enough to hold all the water you wish to boil.) Light flame under pot. Cook until bubbles appear. Keep your eyes closed during the latter part of this process, as a watched pot never boils.

When using a kettle, follow same directions. When the water boils, the kettle will whistle. It will be hot, so do not slap its face.