The air in your lungs replaces the water in the bottle. When each participant had blown all they could blow with only one breath I replaced the lid while the bottle was still under water keeping what was left in the bottle.
Keslee was almost able to empty the entire two liter!
Kalysa took her turn and amazed us all when she emptied well over 1/2 of the bottle. Her lung capacity was just a little less than Keslee's.
Remember this is the same girl that started out on this earth at only 2 pounds 4 ounces and spent the first 5 weeks of her life on a ventilator. That is a scenario that often means asthma or other lung problems for a life time but we have none of that here. Praise the Lord!!
When Kenyon took his turn and blew every bit of water out of the two liter bottle like it was nothing and still had air to spare, we moved to an empty gallon milk jug for his test. After one try with the gallon jug, what we had known all along was confirmed...
MY SON IS FULL OF HOT AIR!! ☺hehehe!! ☺ He almost emptied out the entire gallon! I am sure he would have if we would have kept trying (like he wanted to) but we had to move on. Knowing my son, this is something he will be working on in his spare time until he DOES empty the gallon jug and who knows what size bottle he will want to tackle after that.
Ya know-lung capacity is a big one in the bragging rights of young boys.