I am a father to 4 children. #2 gets my primary vote. I agree with Hans' statements referring to Monkeys. I feel that the D/B's add a degree of complication and safety issues that I would rather not have to worry about while my child is sailing.

Previously someone mentioned pivoting boards ala tornado or H-21 SE. Having owned a H21 SE, I found the kick up D/B's easy to use and worry free in shallow water.