Not one trusted keeper, but many copies that agree: that was the new idea.
In the made-up village of Kettle Hollow, Mira kept one notebook of who owned how many tokens. One keeper's notebook can be lost, soaked or changed.
So the village tried something new: everyone kept their own copy of every payment.
If one copy is changed, the other copies still agree, and the village follows the most copies.
Pages linked in a chain, each with the seal of the page before, make a changed old page easy to spot.
These are some of the questions on the sets. The printable sheets have more and an answer key.
The story the four copies agree on. The village follows the most copies.
They all break. Each page carries the seal of the page before, so one change shows up fast.
2. 5 − 3 = 2, so the changed story now has most copies.
2008. The idea was described in 2008, and the first computers joined in 2009.
With a grown-up, find a trusted source and read about the risks of any new kind of money. What questions would you ask?
This is history and a big idea, not advice about any money. Talk about why many copies that agree are harder to cheat than one notebook, and if your child wants to know more, look up the risks of any new kind of money together.
