What's this?
It's a wheel.
What's this?
It's a pump.
What's this?
It's a safety vest.
What's this?
It's a bell.
What are they?
They're gears.
What are these?
They're brakes.
What's this?
It's a light.
What's this?
It's a lock.
What's this?
It's a basket.
Who is he?
He's a cyclist.