You usually see them in diving competitions. The water spouting into the pool gives the divers perspective on the distance to the surface of the pool.
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Swimming races and diving
To keep the swimmers warm. The large pool is cold
5 or 6 meters
six feet at 7 inch minimun
keep from cramping
I think u can do it
chlorinated fresh water (not salt water )
It's not cold actually the rules mandate that the pool be 79 degrees F
The starting blocks can be no higher than 30 inches above water level.
Events at the Olympics are performed on a three meter springboard and a ten meter platform.
That would be 164 feet long. Add to that whatever size kiddy pool you need. However, the kiddy pool should be separate from the main pool. Check regulations in your state for requirements.