Okay, imagine you have a lot of toys on the floor. A bounded set is like when all the toys are in a big circle drawn on the floor, and they can't go outside of that circle.
Similarly, in math, a bounded set is a group of numbers that are all limited or "bounded" by some condition or rule, like a circle. For example, all the numbers between 0 and 1 are a bounded set because they are "bounded" or limited by those two numbers.
It's like having a toybox where you can only put certain toys inside, and all the others have to stay out. The toybox is the "boundary" or limit for the toys.
So, in summary, a bounded set in math is a group of numbers that are limited or "bounded" by some rule or condition, like a toybox or circle.