Demo 1: write on paper with phenophtalene and then spray with windex (base) to make the words appear (pink). Tymol phtalein gives a blue color.  

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Demo 2: Use Airzooka to blow a cup off a student's head (Flinn AP6657 $20.40)

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Demo 3: Generate carbon dioxide (mix baking soda and acetetic acid or vinegar) to blow out a candle.  Put candles in a aquarium blocked off into  2 pieces so that you have a control.  A piece of wood with holes drilled allows candles to burn.  

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Demo 4: hydrogen peroxide with yeast (catalyst).  Set up a gas collection tube (water in a jar) , add hydrogen peroxide to yeast and collect the gas. Put a glowing wood splint to the bottle and it will ignite.  Burn steel wool in the gas collected. 

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Demo 5: Pressure (suction) cups

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Demo 6: Water in an aluminum can.  Put it on a hot plate.  After a few minutes invert and place in cold water.  Can will collapse. 

 

Demo 7: Thermite balls.  

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Demo 8: Fortune teller fish. 

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