A dumper truck is a big vehicle that helps move things. It has a big box at the back that can lift up and dump things out. Imagine if you have a big pile of sand in your sandbox, and you want to move it to another place. A dumper truck can do that! It can carry rocks, dirt, or even big toys.
When the truck gets to where it needs to go, the back of the truck gets lifted up, and all the stuff falls out. It's like pouring juice from a cup! Dumper trucks are really strong and can help people build big things like houses and roads. They make work easier and faster!
So next time you see a big truck, look and see if it’s a dumper truck! It’s doing an important job!