42 Dodge PU (What's a heater?), 53 Ford Flatbed (Optional Heater not included), 53 & 57 Chebbys & Fords, and a 60 Buick LeSabre (Heat at last!). Dad would tie two ropes on the back bumpers and attach an inner tube to each rope. One neighbor had 6 kids, so we tied two more inner tubes (the bigger ones) in series (total of 6, 3 each side) and had a blast. Word got out and many of the neighboring kids came over. I think we had upwards of 12 kids exuberantly enjoying the rides at one time. Who needed a boat? And the results was a road nicely groomed afterward. Loved country life!