There will be barbecue zones, face painting, karaoke and live bands, including Mysteeq, Atomic Kitten and D-Side to entertain the crowds too.
The first match will be at The Rose Bowl on 13 June, where Hampshire will take on Sussex.
Sussex captain Chris Adams told the BBC Sport website he was not a big fan when he first tried out the short format.
It is a journey into the unknown
Sussex captain Chris Adams
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He said: "I was sceptical at first. I went to New Zealand with England in 1997 and tried Cricket Max, which was a 10-over game, and it just did not work.
"But the ECB has really thought about this and the format is far superior to the one I tried in New Zealand.
"Twenty20 cricket is going to be exciting for spectators to watch.
"It is a journey into the unknown for the cricketers but Sussex have been practising because we are taking the cup very seriously.
"I think it will improve one-day cricket from a fielding point of view, and from rotating bowlers as well.
"And you never know I might even have a go at the karaoke when the matches have finished!"
Hampshire skipper John Crawley is not renowned for his one-day cricket but he is happy to give the format a go.
He told the BBC Sport website: "I amazed even myself when we had a practice. I was smashing the ball all over the place.
"Players are going to have to adapt quickly but I think that makes it even more exciting."