How do you make clouds in your house?

Get yourself an empty two liter bottle. Pour just a bit of hot water in there and shake it with the lid on to get tiny water particles suspended in the air. Take the lid back off and insert a lit match into the opening until it burns out. The smoke from the match is what we want. Twist the cap back on and tightly squeeze the bottle as hard as you can. When you release the pressure, you will find that a cloud formed inside your bottle.