Pictures:

Why does filling up tires keep getting more expensive?

Inflation.

1759

Why is it hard to trust a staircase?

It's always up to something.

2033

What happens if two silk worms have a race?

They end in a tie.

2280

What is black when clean, and white when dirty?

A black board.

2032

What travels around the whole world and stays in the corner?

A postage stamp.

1754

What happens to a snowman that gets angry?

It has a meltdown.

2090

Why can't you trust a staircase?

It is either up to something, or letting you down.

2450

Why don't vegetarian's fight with each other?

Because they don't want to have a beef with each other.

2418

What does the Eiffel Tower have in common with a tick?

They are both Paris sights.

1875

What looks like white paint and smells like blue paint?

White paint.

1755

What do you call a wasp that would prefer to be a bee?

A wannabee.

1560

Why didn't the clam share its food?

Because it was shell-fish.

1766