As a boy growing up, I remember looking with envy at the speedometer on Les Stenerson's Schwinn Orange Krate. In my mind, the five-speed, stick-shifter and slick rear tire were cool, but the speedometer was the accessory that made the bike fast.
Today I put a Sette speedometer on Harris' bike. He gleefully shouted out ascending and descending numbers as we rode around the neighborhood.
Adding this to Harris' Caliente lets him have fun quantifying his rides. It should also help him pedal at a steady pace. He is a great rider, but bounces between about 5 and 14 mph when we ride together. I'm hoping that his speedometer will help him maintain a consistent rate.
Here's a picture of Claire holding his bike. Also, please note, Les Stenerson didn't have panniers.