> leadership qualities, coping with adversity, forces kids to be around other kids instead of in isolation, Experience working with a team from an early age

Got all that from IT club (adversity being when things didn't go well - bugs, network crashes etc)

> how to win and lose gracefully

LAN parties

> coordination

rock climbing

> fights childhood obesity

Not eating junk food seemed to work for me. I wouldn't be so arrogant to say that works for everyone though.