Midrash is just like when an adult tells a story to a child, but it's actually a way for grown-ups to explain and understand stories from their holy book. You know how grandma always tells you interesting stories that make you learn something new? That's what midrash is - teachers and scholars telling stories to explain the Bible in a way that everyone can understand better.
In the old days, people didn't have books like we do now. They told stories to help them learn about their religion and all the important things they needed to know. So, the Jewish people created midrash to help them explain and interpret their holy book - the Torah.
Midrash is made up of lots of stories and commentaries that help people understand the Bible's teachings, and what they mean for their lives. Imagine if you were trying to understand a really long story, like "The Lion King," but you didn't know what some of the words or ideas meant. A grown-up could tell you some fun and creative stories to explain things you might not have known before, like what it means to be brave, or why it's important to listen to your elders.
That's what midrash does - it helps people understand the bigger picture and get deeper meanings from their holy book. It's like the stories within the Bible are the pieces of a puzzle, and midrash helps put those pieces together so that they make sense and are more interesting.