Explain Like I'm Five

Vertical gardens are like walls covered in plants that are really good for the environment. They make our spaces look pretty and help us use rainwater in a smart way. Rainwater goes through a maze of plants and soil, just like a marble goes through a maze in a game. The design of the garden is important to make sure the plants get enough water. The plants grow bigger and their roots make a network that helps them get even more water. It's like a big puzzle that the rainwater has to solve to get to all the plants. The more the plants grow, the more rainwater they can collect and use. It's like a game that gets harder as you get better!