THE LUNGS

       Materials:

-A bottle of plastic

-Scissors or knife

-Y-tubes

-String

-Pair of lates gloves

-Rubber band

   

      Instructions:

-First, cut the bottle in the middle.

-Later, put at the ends of the Y-tubes two glove fingers.

-In the bottom of the bottle, put que palm glove with a rubber band.

Now, try to push up and pull down on the latex on the bottom of the bottle.