Cross-rhythm is like clapping your hands in two different rhythms at the same time. It sounds complicated, but it's actually really cool! Imagine you have one hand clapping every two beats while the other hand claps three beats, like you're clapping to the beat of a song with two different rhythms. This creates a really interesting and unique sound that makes people want to dance! It's like you have two different songs playing at the same time, but they still sound good when put together. Some music styles, like African and Latin music, use cross-rhythm a lot to make their music sound fun and exciting. So, cross-rhythm is basically when you play two different rhythms at the same time to create a cool and unique sound.