The Niger river is like a big long snake that runs through a big country in Africa called Niger. It's a really important river because it provides water for people and animals to drink and bathe in, and it also helps people grow crops to eat. Imagine your garden hose, but instead of watering your plants, it waters an entire town!
Since it's so big and long, some people use boats to travel on it. They can even transport things like food and supplies on these boats. The Niger river also has some pretty cool animals that live in it, like hippopotamuses and crocodiles. So, it's important to be careful when you go swimming in it.
Finally, the Niger river flows all the way into the ocean, where it meets other rivers from other parts of Africa. So, it's kind of like a big family reunion for rivers!