content: I don't know. Similar items are already being sold with oars, though, and they're prettier. If he'd put the battery in a waterproof case, used a linkage that would let him steer a rear-mounted trawling motor, and used pretty pontoons he'd sell more. The pink foam might not fly because it's exposed to damage. If it were sealed it might be okay. I know that TigerFoam is coast guard approved for pontoon floats, so his idea isn't all that crazy.  I found that when I watched a guy building a pontoon boat at lake close to where I live. I thought you could just leave the pontoons hollow. He said that filling them with foam makes them virtually unsinkable and that fiberglass boat builders use it in the hull. http://tigerfoam.com/sprayfoaminsulation/technical/estimating/