Concrete block

Concrete block is a type of material that people use to make walls and buildings. It's like a really strong and heavy Lego block that grown-ups use to build things. Concrete block is made by mixing together a bunch of different materials, like cement, sand, and small rocks. Think of it like making a big sandcastle with a special type of sand that gets really tough when it dries. The mixture is then poured into a special mold and left to dry for a while, just like when you make Jell-O in a mold.

Once the mixture dries and gets really hard, it becomes a big solid block that can be used to build things. These blocks are usually gray and can be different shapes and sizes. Some are big and flat, kind of like a iPad, while others are long and skinny like a hot dog. People use these blocks to build walls and buildings that can last for a really long time, because they are super strong and durable. Imagine building a really cool fort or castle with these blocks, but on a bigger scale, and you'll understand what it's like to build with concrete block.