Cheonggukjang is a type of food that comes from Korea. It is made from soybeans, which are little brown things that grow on plants. When you want to make cheonggukjang, you start by soaking the soybeans in water for a long time. Then you cook them and mix them with a special kind of bacteria called Bacillus subtilis.
But, you have to be careful! The bacteria can be very dangerous if you don't use it the right way. So, grown-up people who know what they're doing make cheonggukjang.
After the bacteria makes its magic, the soybeans turn into a kind of paste. It might not look very nice, but cheonggukjang is packed with good things that are good for you, like protein and fiber.
Some people like to eat cheonggukjang with rice, or with vegetables like kimchi. It can be pretty stinky, and some people don't like the smell, but other people love it!
In conclusion, cheonggukjang is a sticky paste made from soybeans and bacteria that is good for you, but you should let grown-ups make it because it can be dangerous.