Kids Riddles

Question: What is the difference between a dollar and a half and thirty five-cents?

Question: No matter how terrible things get for the people of the Arctic, they will not eat a penguin.

Why not?

Question: I have no wallet but I pay my way.I travel the world but in the corner I stay.

What am I?

Question: I am a digit, but two of the ten.
Two of me make a promise.

What am I?

Question: Why does the second shape have an open block when the first shape does not?