A friend who runs a maker summer camp contacted me a few weeks ago to see if I would be up for doing some welding at her camp. When I found out the details, I was definitely up for it: help some kids build a human-powered paddle boat out of recycled materials!
The first step was to find materials. We lucked out, because it was bulky trash pickup week in her neighborhood and someone a few blocks away was throwing away a bunch of plastic water bottles.
For the deck, we scavenged some 3/4" plywood. No my first choice, but the guys wanted to be sure it was REALLY sturdy!
We decided to make the water bottles into two crude pontoons by duct taping them to boards and strapping them to the deck.