The phrase 'ball pool' is correct and usable in written English.
It is usually used to describe a pool of balls, such as that found in a game of billiards. For example, "She lined up her shot and sunk the 8 ball in the corner of the ball pool."
Sir Patrick's snap of himself and his wife in a ball pool is a nod to a previous photograph which went viral after he tweeted it (below).
Eschewing Hello magazine or a newspaper advert, Sir Patrick, 73, announced the news of his third marriage via Twitter, sharing a photograph of himself and his bride with their heads poking out of a children's ball pool, accompanied by the words: "Yes, married".
You don't even need to whisper it any more: Burning Man has developed a reputation as a networking event for well-connected Silicon Valley types looking for creative spaces to express themselves now that the office games room and ball pool have jumped the shark.
Back at the station, the Aso Boy train (asobouyo means "let's play") seemed to have been designed with children in mind, with its Kuro-the-dog logo and special carriage featuring white-leather, child-only seats, a wooden ball pool and library.
If you are feeling nostalgic, take a look at the Ball Pool experiment from 2009.
They want to raise funds for a ball pool big enough for 50 students at a time.
This leisure sandwich is even topped off by a penthouse nursery with a ziggurat of ball pools and sandpits on its own roof terrace.
Collies diving into ball pools felt like a recipe for broken legs to me, but they didn't seem to mind.
True, you might legitimately level the same accusation at eight-ball pool, but eight-ball pool is not, praise the Lord, an Olympic pursuit.
The leagues play basic eight-ball pool with variations on the rules of basic bar pool.
Shortly before the first tournament of the season, last month's Totesport Grand Prix, White injured his back while breaking off, somewhat too vigorously, in a nine-ball pool exhibition against Phil Taylor, the PDC world darts champion.
