So, imagine you have a toy box full of toys, but you don't really like the toy box because it's old and broken. You also don't like the kid who gave you the toy box because they're mean and bossy.
One day, you and your friends decide you've had enough and you all get together to make a plan to get rid of the old toy box and the mean kid. You come up with a really good plan and you all work together to make it happen.
That's kind of what happened during the 1911 Revolution in China. The people of China were tired of being ruled by a government that didn't care about them and they wanted to get rid of it. They also didn't like the Emperor who was the head of the government because he was mean and didn't listen to them.
So, a man named Sun Yat-sen got a group of people together and they made a plan to overthrow the government and get rid of the Emperor. They worked really hard and eventually, they were successful! This was a big deal because it was the first time in China's history that the people had overthrown their government.
After that, the people of China were able to start a new government that was more fair and listened to what they wanted. It was like getting a new toy box that wasn't old and broken, and a new friend who was nice and didn't boss you around.
That's just a simple explanation of the 1911 Revolution, but hopefully, it helps you understand a little better!