Breath capacity. sounds weird, i no, but its a good idea.
you need 2 water carriers, the kind where you press and water comes out. it would help if the thing that u push comes off easily. so u get off the push things, and u have a tube that connects the 2, and a tube or something out of the top of 1 of them. u fill the one with a tube in it 3/4 full of water, and the other with nothing. u have someone blow into the tube, and the water will go into the other one. u measure that, and then thats their lung capacity.
Good Luck,
PenguinLover
P.S. Don't forget 2 get CREATIVE!!!!!
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