Trikkes...
What are these strange zig-zagging things?
They are called Trikkes, pronounced trike, but spelled with two K's. A Trikke is a relatively new type of human-powered vehicle. Everyone asks "How do you make it go?" It doesn't have a motor. You propel it in a slalom pattern by turning, leaning your body, and by pushing with your arms and legs. The motion is a bit like roller blading or skiing.