Using Casagami is easy. First, assemble it. It only takes a couple of minutes and you don't need any glue. Once assembled, place it on the window sill during the day so it can soak up sunlight and charge. When it's time to go to bed, it'll light up for about 5 hours. There aren't many special care instructions. Just keep it away from water as it's not waterproof. If you want to change its look, you can choose a pre - designed one or get a plain white one and decorate it however you like. Remember, the better it charges during the day, the longer it'll light up at night.