What I learn in the billy cart day


Simple machine

My billy cart blue print

Hari saya pergi ke tukang kayu


 17 January 2008 it is the day that I learned how to make the billycart safe. I learned that the metal wheel bearing. The wheel bearings is more better if the billy cart you want it fast. But the metal wheel bearings is easy to slide because when it's fast and turn to any direction and it can be drift.