A dollar store is a place where you can go to buy things for just $1. That means that everything you see in the store costs the same amount of money. You can find all kinds of things in a dollar store, like toys, books, candy, school supplies, and even things for your home like dishes and decorations.
The reason why the dollar store is called a "dollar store" is because everything costs just one dollar. That's why people like to go there because they can get a lot of things for a really low price. It's like a big treasure chest where you can find lots of things without spending a lot of money.
However, just because things are cheap, doesn't always mean they are good quality or will last a long time. Sometimes, things may break or not work as well as you'd like because they were made with less expensive materials. So, it's important to be careful when you're shopping in a dollar store and make sure you're getting something that's worth the money you're paying.