Swimming pools that run a baby class..

I doubt we have something like this here.

I am just curious if there are any age restrictions for these classes.
We are bathing Alex in a large bath tube for matures, where he can swim and play like in a swimming pool.
I have also read that it is very good for health and coordination and as I can see it really works. Presently I just keep his head and he swims on his back, he also likes to walk in the water with my support - it's easier for him.
Unfortunately we have missed the first month when his swimming instincts were still fresh, my father gave me an expensive and small plastic bath-tube specially for babies and first month he was just sitting and we were washing him, until my brother opened my eyes that the bath-tube should be large.
We are also dropping the water temperature gradually so he is now bathing in less than 30 degrees C, this way his thermal regulation mechanism is stimulated and he is more resistant to changes in temperature.
Regarding Baby yoga, it is a set of exercises that parents can do together with the baby.
