www.lanoworld.blogspot.com
Our daughter Phoebe is 7 and has been sailing for 2 years on and off, but has really started to demand that we hit the lake every weekend for a few hours to sail (you have no idea how good it feels when she says, when can we leave to go to west lakes!)
We have travelled a bit to Maui and she has had a few lessons with
actionsportsmaui.com/windsurfing-tips/ , these guys run a kids club that is for kids only! Dave and Susie are great instructors and always put on a great program.
My advice is to get a big wide modernish board and a kids specific sail under 2.0 to start.......