 In line with its reputation for sensitivity to nature, Japan has a number of indoor spaces that actively include the movements of the weather. Designers such as Kengo Kuma and Toshito Yokuchi, for example, have produced stunning indoor environments animated by the natural movements of the sun, wind and rain. Here we see indoor sunlight passing through a wind-disturbed roof pond. Here, the indoor experience of rain on the same glass roof pond. In this example, wind-animated foliage silhouettes are being cast on a translucent screen. Designing all buildings this way would clearly not only take a great deal of money, but also a long time. There are, however, simple ways to create this kind of natural indoor animation in your own home right now and at minimal cost. All of the following examples were created in my own house for less than $50. Placing an inset screen and a net curtain in an existing window, for example, would generate monorail patterns that change as the wind outside varies. This works even on overcast days, but in direct sun the monorail patterns are also cast as moving shadows on indoor surfaces. If you have a deck or balcony that receives direct sun, the wind-generated movements of foliage can either be back-projected onto shades or directly projected onto interior surfaces. If sunlight passes through small enough openings, between leaves, for example, wind-animated indoor images of the sun can also be generated indoors. Placing a shallow tray of water on a sun-facing balcony or deck can project wind-animated water reflections, either directly onto interior surfaces or onto the back of a translucent shade. Here we see the effect produced at night by directing a security light onto an external water surface. At night, the same external light and tray of water can also project ripples caused by raindrops onto an interior ceiling or shade. Because they are so familiar, these natural movements can keep us alert without being distracting. Best of all, however, like an old friend, they help to calm us.