Oshibana is a Japanese art technique where you take flowers and leaves and press them flat. It's similar to when you put a heavy book on top of something and it gets squished flat. Once the flowers and leaves are flat, you can arrange and glue them onto paper to create beautiful designs, like a picture or card. It's like making a puzzle, but with pretty pieces from nature. People like to make oshibana because it helps them feel close to nature and appreciate the beauty around them.