Get a Laser or a Sunfish, used. Check the Cape Cod Times on Sundays. You can usually get a sunfish for about $600-800. Beach wheels are a good idea also. Kids can sail, and the boat is very forgiving. You''ll get wet, though. If a ''dry'' boat is more to your liking, look for a Beetle Cat.The price is much greater, there is upkeep involved, but it is a clasic.