Okay, so imagine you and a lot of other people really love a special snack. Let's call it "Jesus crackers". You believe that when you eat these crackers, it's like you're eating a special part of God.
Now imagine that lots of people around the world also really love Jesus crackers! They all have their own ways of eating them, and some even have special songs they sing while they eat them.
A eucharistic congress is a big meeting where lots of people who love these crackers come together to celebrate how awesome they are. They talk about why they love them so much, and they even have special prayers and ceremonies to honor them. It's like a big party for Jesus crackers!
But it's not just about having fun. People at the eucharistic congress also talk about how they can do good things in the world because of their love for Jesus crackers. They want to make the world a better place and be kind to others.
So, a eucharistic congress is basically a big party and meeting for people who love Jesus crackers, where they talk about why they love them and how they can be better people because of them.