Do you think it would be mean to our 4 yr old dd to let our 7 yr old dd do the Dolphin swim at SW san diego? I don't know how long it lasts, but if we did it would be myself and dd7 and then dh and dd4 would take pictures (if they are allowed in that area???) Also, does anyone know how good of a swimmer you must be to do this? Any info about what they do and how long it lasts would be great!!!