Okay kiddo, so you know how we use glass to make different things like windows, cups, and mirrors, right? Well, a long time ago, some governments decided that they wanted to make some money off of people who made things out of glass. So they put a special tax on the glass that they made.
Now, this tax meant that the people who made glass had to pay extra money to the government every time they sold something made out of glass. And sometimes, the tax was really high - almost as much as the cost of making the glass itself! This made it really hard for people to afford things made out of glass.
But why did the government do this, you might ask? Well, some say it was to make money for the government, while others say it was to protect industries that made things out of other materials. Whatever the reason, it made glass more expensive and harder to come by.
Luckily, times have changed and most places don't have glass taxes anymore. And we can all enjoy things made out of glass without worrying about extra fees!