The water wheel:
Even B had a great time. Maybe especially B.
Bernouli's Ball. Also replicated with a scuba tank and a golf ball if you remember,...
Yay! Goal achieved! A ride in silence. No: "Knock it off!" "No, I am not listening to Ozzy Osborne again." "Or Smashmouth." "I know Smashmouth sang all the Shrek songs and I like them too, but I don't want to listen to them again." "Sabrina, stop screaming at your brothers." "Zach, just give her a goldfish cracker so she's quiet." "Kyle, is your seatbelt on?"