Want to buy good gear for young children? Check out the Ezzy Kid Rigs. These Rigs come with 2 sails - the smaller one is great for kids 5-8 - it's got a 1 and a 1.5 m sail, with small boom that's just right for kids:
http://www.ezzy.com/2007/sails/kids07.cfm

Starboard has a Pro-Kids team - more about that at:
http://2006.star-board.com/teams/pro_teams/proteamkids.asp