From the ARRL web site dated 10/16/12:
JOTA is an opportunity for Cub Scouts, Boy Scouts, Girl Scouts and Girl Guides from all over the world to experience the magic and excitement of Amateur Radio...
...According to Boy Scouts of America JOTA Organizer Jim Wilson, K5ND, more than 250 JOTA stations have registered with the BSA. “We estimate that there will be nearly 17,000 Scouts in 45 states, Puerto Rico and a few countries on the air for JOTA,” Wilson told the ARRL...
...“We encourage hams to get on the air and hand out QSOs,” Wilson said. “Remember that JOTA is about conversations, not the number of contacts. Have conversations with Scouts that introduce them to the technology, fun and magic of Amateur Radio. Sometimes you can actually ‘hear’ their eyes light up with a new discovery. Get on the air and mentor the next generation of hams.”The rest of the story, frequencies of operation, and links to other related information, can be found here:
http://www.arrl.org/news/get-ready-for-jota-this-weekend
