For advanced folders over the age of 13 - amaze your buddies! Use copy paper (Letter or A4) for best results. Original models designed for serious flight, some are simple, others complicated. Develop your folding and flying skills. Some of the models in this app are advanced designs, you will need the skills of patience and persistence, coupled with your own innate experimentation to make even better models. Train your spatial intellect as you work out how to fold them and be inspired to des