Well since two of y'all got it I'll tell you. (My in-laws, who are Texans, are joining us in a few days so I'm practising with the "y'all".)
Badminton! I have to say, when he announced this at dinner the other night, me and the teens took about five seconds to figure out what he meant then fell about laughing.
Me: "First you catch a bat".
Man-child: "Then you knit it a teeny sweater".
Actually it's the image of 18 6-7 year olds charging around with badminton raquets that's rather worrying. Black eyes all round I think. Perhaps even more dangerous than if they were playing with hot wax and batik-ing,
And did you know that the word "shuttlecock" is met with titters and giggles here? It's just a plain "birdie".