Okay kiddo, have you ever heard of the country Russia? Well, in Russia, there is a big river called the Siberian river. The river is very long and has many branches that go in different directions.
People have been using these river branches to travel on for hundreds of years. They use boats called barges to carry goods like food, clothes, and even timber from one place to another.
Now, imagine you're a trader who wants to sell your goods in a different city far away. You could load your goods onto a barge and it would travel along the Siberian river routes to get to the other city. Along the way, you might stop at small towns to sell your goods or even trade with other traders.
The Siberian river routes were very important for trade and transportation in Russia because they allowed people to travel long distances without having to cross difficult terrain. The rivers could even freeze over in the winter time, creating an actual road for travelers to use!
So, in short, the Siberian river routes are a series of rivers in Russia that people have been using for hundreds of years to travel and transport goods.