After learning about the Wright Brothers’ Bicycle shop, we spent some time taking a long hard look at what goes into a bicycle. The kids noticed the obvious things first, wheels, seat, handle bars but after a while they got more detailed pointing out the petals, chains, gears, etc. We talked about what powers a bicycle and how the wheels turn. We talked about how you control the bike (direction, brakes) and why that was important. We also talked about the materials used to make a bicycle. The kids required little to no prompting on these observations. Bug was truly fascinated with the mechanics.