Bamboo, the Giant Grass
Bamboo can look like a tree, but it is really a grass. It belongs to the same big plant family as lawn grass, wheat, and rice. The difference is size. Some kinds of bamboo stand taller than a house.
The stem of a bamboo plant is called a culm. It is hollow inside, with solid rings spaced along it called nodes. The nodes act like braces, making the stem strong even though it is empty in the middle. That mix of light weight and strength is one reason bamboo is so useful.
Bamboo is also famous for growing fast. Many plants start with a single shoot that pushes up from underground. The new shoot already has all of its rings packed inside, and it stretches out quickly, a bit like a telescope opening. Some kinds can grow very tall in just a few months. After that, the stem does not get any thicker or taller, but it becomes harder over time.
People use bamboo in many ways. They build scaffolds, fences, and furniture from it. They weave baskets and make floors and cutting boards. Young shoots of certain kinds are cooked and eaten as food.
Giant pandas also eat bamboo. Because it grows back quickly, bamboo is a plant that can be harvested again and again from the same patch.