I taught my daughter about communism.
I had her set up a lemonade stand.
After 6 hours, she made $35.
Then I took $15 as her landlord, $5 for renting my table, and $10 for supplies.
When she complained I told her, "That's how communism works."
She replied, "No, Daddy, that's literally capitalism. Marx talks about this in his chapter on Surplus Value and Exploitation."
Which is why l've now decided to start homeschooling her.