Explain, in simple terms, that taxes are money everyone contributes to pay for shared community services.
Community services like fire departments, libraries, and schools cost real money to run. That money has to come from somewhere -- it comes from taxes, which are small amounts of money that people and businesses pay to the government.
Think of taxes like a classroom supply fund: if every family gives a little money, the class can buy things everyone shares, like art supplies. Nobody has to pay for the whole thing alone, but everyone chips in a little so the whole group benefits.
Mastery looks like: They can explain, in simple terms, that taxes are small contributions from many people that add up to pay for shared community services.
Common stumbles: Thinking taxes pay for one person's own personal things, instead of understanding they fund SHARED community services.