Okay kiddo, have you ever played with sand or dirt and made a sandcastle? Compressed earth blocks are kind of like that, but they are bigger and stronger.
Imagine if you take some dirt or clay and put it in a special machine that squishes it really hard. The machine makes the dirt or clay stick together really tightly, kind of like how you can squish sand and make it stick together to make a sandcastle.
Once you have a compressed earth block, you can use it to build things, like a house or a wall. Since the dirt or clay is really tightly packed together, the blocks are very strong and can hold a lot of weight.
The best part is that compressed earth blocks are really good for the environment. They don't require a lot of energy or resources to make, since the main ingredient is just dirt. Plus, they are very sustainable because they can be made locally, which means you don't have to transport them long distances and burn a lot of fossil fuels.
So, compressed earth blocks are a special kind of building material that are strong and sustainable because they are made of compacted dirt or clay.