Watt's linkage

Okay, so imagine you have a toy car that you play with. Now, when you push the car, it starts moving and the wheels turn. But sometimes you might want the wheels to move in a certain way, so that the car turns smoothly and doesn't wobble.

That's where Watt's linkage comes in. It's like a special system that helps the wheels move in a certain way, like a robot that controls them. It's named after a man named James Watt who made steam engines a long time ago.

Basically, Watt's linkage has four bars (like long sticks) that are connected to the car's wheels. These bars can move and twist in certain ways to make the wheels turn smoothly. It's like a puzzle where you have to fit the pieces together just right to make it work.

When you push the car, the Watt's linkage system helps the wheels move smoothly and makes it easier for the car to turn. It's a really cool invention that helps a lot of things move the way we want them to.