Using your Casagami is easy! First, take the adhesive 'Solarmodule' and the pre - cut paperboard sheet from the flat cardboard envelope. Assemble them in a couple of minutes without using any glue. Once it's put together, place it on the window sill during the day so it can soak up sunlight and charge. When it's time for bed, it'll be ready to light up your room. Remember, a full day's charge in the sun will give you about 5 hours of light. If you choose the plain white design, you can get creative and decorate it however you like. As for maintenance, keep it clean and dry. Since it runs on solar energy, make sure it gets enough sunlight regularly. Also, it's made from recycled or PEFC paper, so handle it gently to avoid any tears. We've made it with green, non - toxic inks, but still, keep it away from very rough handling to maintain its look.