Using your Casagami is super easy. First, take out the adhesive 'Solarmodule' and the pre - cut paperboard sheet from the flat cardboard envelope. Spend a couple of minutes assembling the Casagami. No glue is needed, so it's a hassle - free process. Once assembled, place it on a window sill during the day so it can soak up the sunlight and charge. When it's time for bed, turn it on, and it'll light up your room for about 5 hours. As for maintenance, keep it clean by gently wiping it with a dry cloth. Avoid getting it wet as it may damage the solar module. If you want to decorate the plain white version, use non - toxic markers or stickers. Remember, since it runs on solar energy, make sure it gets enough sunlight during the day for a good charge.