A céilidh (pronounced kay-lee) is like a big party or gathering where people come together to sing, dance, and have fun. It's a traditional type of event that comes from Ireland and Scotland, but it happens all over the world now.
At a céilidh, there is usually live music played on instruments like fiddles, flutes, and guitars. There might also be a special person called a caller who tells everyone what to do during the dances. The dances are usually pretty simple, like skipping or stepping in time to the music, but they can get a little tricky sometimes!
One of the most important things about a céilidh is that everyone is invited to join in, no matter their age or dancing ability. It's all about having fun together and celebrating music and culture.
So, imagine a really fun and lively party with lots of people, music, and dancing, and you've got a pretty good idea of what a céilidh is!