Ok, so imagine a big party where there are lots of people making things out of metal. These people are called blacksmiths and they use special tools and a big fire to shape the metal into different shapes like swords, horseshoes, and even sculptures.
At the festival, you can watch the blacksmiths work and ask them questions about what they're making. You might also see other cool things like demonstrations of how to make different shapes and patterns with the metal.
There might be food and music too, so it's like a big fun party with lots of things to see and do. And at the end of the day, you can even buy some of the things that the blacksmiths made if you want to take a cool piece of metal art home with you!