system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 How does printing more money put more into circulation? i.e. How does it get into consumer's hands?

How does money go from the printing press to the public's hands.

Bonus question: ELI5: how this translates I to inflation.
gpt
Think of the Federal Reserve literally as the economy's heart.  The Fed controls the circulation of the money supply - eventually it all passes through the Fed.  When times are tough the Fed increases blood pressure by printing more money (more blood) and circulating it around.  If the economy starts hyperventilating and overheating from too much growth the Fed will reduce blood pressure by taking money out of circulation. 

The Fed introduces money by buying bonds, reducing interest rates, and reducing the reserve ratio banks are required to have on hand in cash.  The Fed can also "print" money by making new loans, sometimes for huge amounts, to institutions either for free or extremely cheaply.  It reduces the money supply by selling bonds, increasing interest rates, and increasing the reserve ratio.  

This is a delicate process and can lead to inflation if too much money is introduced too quickly or when it is not needed.  If too much money is taken OUT of the economy, or if it is taken out too quickly, it could backfire and cause recession and deflation.