For scientists, it's very important to be in a creative environment, so sometimes it's like being a small boy or girl playing a game, and while you're playing you may have some fantastic ideas. That's why my other playground is the soybean field.
If you're a researcher, you can't limit your work to 9-5. Sometimes you may suddenly have an idea, and think "I want to try this out!", then the next morning you come to the institute, you try it out to see whether it works or not. Creativity is not something that you can buy in a shop or plan ahead for, it needs the right environment, and you need to have to the right people around you.