The Business Guinea Pigs move into their winter quarters
Today Rocky, Toffy, Mojito and Mr. Grey moved out of their outdoor enclosure and into their big winter quarters inside the house. A look behind the scenes with the real Business Guinea Pigs.
Rocky usually has a plan already. Mr. Grey knows the history behind it. Toffy asks whether it's even fair. And Mojito, of course, has read the fine print. Together they explain money, prices, companies and the government in a way that actually makes sense.
The books are on Amazon and in the FLITCH shop. Their world lives here.

Welcome! The Business Guinea Pigs is a bilingual book series: every paragraph in German, with the English right below it. Kids read the story in English and pick up German along the way. The rules and numbers on this site are the ones that apply in Germany.
The latest from the real guinea pigs, the series and the printables.
Today Rocky, Toffy, Mojito and Mr. Grey moved out of their outdoor enclosure and into their big winter quarters inside the house. A look behind the scenes with the real Business Guinea Pigs.
Rocky splits the old lemonade stand into twenty cards and sells nineteen of them. What a share is, how a share price gets set and why co-owner doesn't mean boss. For kids 10 and up.
24 doors plus two extras to color, starring the Business Guinea Pigs. A German-language PDF for €4.90 in the FLITCH shop and on Etsy.
Because they see the same situation from completely different angles, money and business become something you can actually get your head around. Here they introduce themselves with the line from their profile.
Every question gets a short answer, a scene with the right guinea pig and a little quiz. No account, no grades.
Volume 1Why do we pay taxes?The short version →
Volume 1What is profit?The short version →
Volume 2What is a contract?The short version →
Volume 2What is a subscription trap?The short version →
Volume 3Revenue or profit?The short version →
Volume 3What does a boss do?The short version →
Volume 4Gross pay, net pay?The short version →
Volume 4Where does your paycheck go?The short version →
Volume 5Why does everything cost more?The short version →
Volume 5What is purchasing power?The short version →
Volume 6What is a share?The short version →
Volume 6What is a dividend?The short version →Each volume tells an everyday story and can be read on its own. Every paragraph is in German with the English right below it, so kids can read in English and pick up some German along the way.

What a share is, how a share price gets set and why co-owner doesn't mean boss.

Why prices go up and the same money buys less later on.

Wages, taxes, social insurance and what an employee really costs.
Rocky, Mr. Grey, Toffy and Mojito aren't made-up mascots. They really live with us. In summer they're outside in their big outdoor enclosure; in the cold months they move into their quiet winter quarters inside the house. In the books they talk a bit more than in real life. Usually.




The FLITCH Club has free single pages to go with the books: the “My First Lemonade Stand” math worksheet from Volume 1, two coloring pages for Volume 1 (Rocky's big idea, Toffy's lemonade stand), a certificate and materials for parents who want to talk with their kids about money. Plus new little extras, added regularly. All you need is an email address; signing up is a job for the grown-ups.
Not part of the Club: the Business Guinea Pigs coloring book (€4.90), Die Schweinchenkasse, an allowance planner (€6.90), and the Advent coloring calendar (€4.90). They're German-language booklets you can buy in the FLITCH shop and on Etsy.

One line, three suspects. Tap your pick.
1. Which guinea pig explains this? “Too cheap always smells like a catch.”
Here you'll find ages, learning goals, the topics in each volume, sample pages and materials for school. The books are educational stories: simplified for kids, accurate on the facts, and not financial or legal advice.

The books are on Amazon; coloring books and extras are in the FLITCH shop and on Etsy.
Go to the FLITCH shop Books on Amazon FLITCH on Etsy