See how easy that was? Some guy invents a “better” mousetrap (The Segway for $5,000), and then some other guy comes along and figures out a practical use for the technology, and for a lot cheaper price (I’m guessing about $100). If I was one of the companies that make training wheels for bicycles, I’d reconsider my long-term business plan. Fortunately, the field is still wide-open in the buggy whips industry.

The neat thing about this gizmo is that you only have to buy one. After learning to ride a bike, you won’t need it anymore, so you give it to your little sister. Or you sell it to your little sister. Whatever. Taken from a consumer standpoint, it’s almost the perfect product.