My thought is that if we are not in a hurry, and the kids can switch between different seating options (pedal or not pedal, sitting upright or in a recumbent fashion) that we all might survive.
The kids are excited about the idea, but they don't really understand the magnitude of the endeavor. They remember laughing non-stop on while riding with several hundred other cyclists on a tandem rally last July.
I want our kids to grow up knowing nothing is impossible and what others think is crazy can actually be fun. The 8yo already has almost 20 minutes logged flying in a vertical wind tunnel (indoor skydiving).
Thanks in advance for the advice through experience.