Skateboard
device · 1950 · Digital age
A board on four wheels.
What it is made of
- Ball bearing — has part. Wheels on bearings.
- Wheel — has part. Four wheels.
Principles and materials it uses
- Wood — is made of. The deck is laminated maple.
- Polyethylene — is made of. The wheels are polyurethane.
Things built in a similar way
- Kick scooter — works like. A board on wheels driven by pushing off; the kick scooter adds a handlebar.