My favourite piece of technology

Hi guys, greetings for all of you, today I will talking about my favorite piece of technology. In this chance was very difficult to me choice one piece of technology against all the many thinks that are nowadays, but my best option was the bicicle.
The bicicle is a non-motorized vehicule that its makes basically with a frame of steel (or other kind of material) and two wheels who works with pinions locates in the back and in the midle of the bike unite with the pedals who wors with our feets.
I got my first bike when I was a kid, at the age of five years old, and I love it, the bicicle was one of the most important think in my childhood, and nowadays still have the throne.
I use the bike everytime I need to go faster in whatever place.
My life without the bicicle... would be very routine, normal, boring and the most important, without adrenalin and energy.