Glagolitic alphabet is a very old way of writing letters that people used a long, long time ago. Imagine you have a big box with lots and lots of toys in it, and you want to keep them organized. The Glagolitic alphabet is like a set of labels that you can use to write the names of all your toys on so you can find them easily when you want to play with them.
Back in a time when people didn't have computers or phones or books, they needed to find another way to keep track of things they wanted to remember. Some people tried to remember things by telling stories, singing songs, or making drawings. But others thought it would be better to write things down, so they would not forget them. They could create new words and write them down using the Glagolitic alphabet.
The Glagolitic alphabet is made from special shapes that look like letters - like circles or squares with lines and dots. Each shape represents a different sound or letter, just like when you learn your ABCs. For example, "A" is the first letter of the regular alphabet, and "Az" is the first letter of the Glagolitic alphabet.
People who used the Glagolitic alphabet a long time ago were called Slavs. They lived in a place that we now call Eastern Europe. They were very smart and clever because they invented this new way to write things down, so they could remember them.
Today, people don't use the Glagolitic alphabet very much anymore because we have other ways of writing things down, like the regular alphabet or typed letters on a computer. But it's still very interesting to learn about the Glagolitic alphabet and the people who created it a long time ago.