A skid-steer loader is a big machine that can help move things around, kind of like a really strong and powerful shopping cart. It has four wheels and it can turn really easily by using something called "skid steer," which means that the two wheels on each side of the machine can turn at different speeds to make it go in different directions.
Think of it like when you're playing with a toy car with four wheels - if you turn the front wheels to the left, the car will go left, and if you turn them to the right, the car will go right. That's just like how the skid-steer loader works!
These machines are really helpful to have on construction sites, farms, or anywhere else where people need to move heavy things around. They have a big scoop on the front (kind of like a big spoon) that can pick up dirt, rocks, or even snow and move it to a different spot. Sometimes people also put different tools on the front, like a big brush to sweep the ground or a big hammer to break up rocks.
Overall, skid-steer loaders are really cool machines that can help people do some really tough jobs!