What is a hooverville?

In the great depression people used to live in a hooverville ( a house made out of cardboard ). The people in the great depression would blame it on the Republican President Herbert Clark Hoover.The people in the hoovervilles would blame Herbert C. Hoover because they thought that he wasn't doing his job. Bud , Not Buddy is just when the great depression was passing by.

 Caption: This is a little boy sleeping in a cardboard in a hooverville.