Hello, young one!
Do you know what music is? It's like when you sing or play an instrument like the piano or guitar. Sometimes people like to mix two types of music together, like a peanut butter and jelly sandwich!
Celtic fusion is when people mix traditional Celtic music (from Ireland, Scotland, Wales) with other types of music like rock or jazz. It's like taking the peanut butter (Celtic music) and adding jelly (rock or jazz).
They use instruments like the fiddle (a type of violin), bagpipes, and flutes to play the Celtic music part. Then they might add in a guitar or drums to create the rock or jazz part.
It's a fun way for people to keep the spirit of traditional Celtic music alive while also trying out new things. Plus, it sounds really cool when you mix the two together!