Goofing around in the pool

[DetectorGuy]

Yesterday my 11 yr old daughter was telling me how boring it was to swim in our cheap 4' deep pool. I told her that if she uses it to practice different things she can use those things in bigger water. I showed her how to frog kick with the fins and she took to it right away. Next I took two 4 pound hard weights and tied them to a 52 ounce plastic Folgers coffee can. I gave her an empty Gatorade bottle and told her the rough principles of using lift bags. I told her to use the gatorade bottle to bring air down to the coffee can "lift bag" and fill it. On the first launch it rocketed to the surface, the can rolled to the side as it broke the surface, lost some air and the whole thing went down as fast as it came up. I told her that is why the lift needs to be controlled on the ascent when using the open bottomed "lift bag". She had fun with this for quite a while. After a bit she was filling the "lift bag" with her breath. she worked on trying to make it nuetrally buoyant and understood the whole concept of the air compressing more as she pulled it to the bottom of the pool loosing buoyancy. She told me that now she wants more weight and a bigger lift bag. She wants to be certified for her 12th dirthday next May so I thought I would get her started this winter with the classroom part. I am always proud of her but when she shows intrest in diving... I'm smiling from ear to ear.