Build Something Good - The Upcycle Shop (Elementary School)
Find something boring. Make it new. Sell it.
The economic lesson is fundamentally different from a lemonade stand. Value isn't purchased and resold. It's created through the kid's own effort and judgment.
Kids hunt around the house for plain, unused items that nobody is using. Wood frames. Glass jars. Plain canvas bags. They learn to see possibility where most kids see junk. Then they transform a few items into things a stranger would actually want, set up a real sale, and run it.