Okay kiddo, so you know how when you're walking you might make a rhythm with your steps, like "step, step, hop, step"? Well, when people play drums together, they also make a rhythm called a cadence.
A drum cadence is like a song that the drummers play, but instead of singing, they use their drumsticks to hit the drums in a particular way. The cadence usually has a specific pattern, like "boom, boom, pop, boom, boom, pop" or "rat-a-tat-tat, boom, rat-a-tat-tat, boom."
Drum cadences can have different styles or sounds depending on the music being played. For example, a marching band cadence might have a strong beat so that the band can keep in step when they're marching.
Overall, drum cadences are a fun and rhythmic way for drummers to play together and create music.