Pat, By comparison the boats you mentioned are too heavy, and too complex. The boat I had in mind would be so simple it would be rigged in about the same time it would take to put your sailing clothes on. So mum and dad could rig their boat and in the times it takes Johnny to get dressed his boat would be rigged too. He sails around in the shallows while mum and dad go racing.
When you have enough kids sailing around in the shallows you can start organising races for them or better still ball games on the water. Ball games on the water can be a lot of fun if the boats are agile enough.
Regards, Phill
I know that the voices in my head aint real, but they have some pretty good ideas. There is no such thing as a quick fix and I've never had free lunch!