Dollars and Sense / Berenstain Bears

By Stan and Jan Berenstain
How did Brother and Sister's mindset change about money from the beginning to the end?
Papa said that money doesn't grow on trees which is an example of an idiom. What are some other sayings that aren't literal?
Example: She spilled the beans. It's raining cats and dogs! I'm on Cloud 9!
Would you rather have 1 dollar bill or 100 pennies? Why?