Sun-based Science: Use the power of the sun to create art,put plants,flowers or other things on the paper,then it with clear glass or acrylic board,put it under the sun,then rinse the paper with water and dry it to get beautiful art Good Design: Sensitive nature printing paper is made of blueprint paper material,not easy to break or tear,light weight,but please note that it needs to be stored away from light to avoid exposure Proper Size: The cyanotype paper is about 15 x 10cm/5.9 x 3.9 Inchs,suitable for showing in a 6 Inch photo frame Wide Application: Sun art paper is a great craft activity that can be used as a science tool to create together in classrooms,camps,libraries,etc. to develop children's interest and improve their hands-on skills,and the finished product is also beautiful decoration