Origami, the ancient art of folding a flat-piece of flexible material such as paper into a 3D shape, has attracted the attention of the scientific community. Origami design of 2D crease pattern originally is developed for human. However, in order to receive the folding pleasure, some crease patterns even are difficult to fold by hand. One of the most interesting applications of origami is in robots, so origami robot is designed to emancipate human from the hard work, but some of these robots use complex mechanisms to work properly. Here, we try to search for a breakthrough strategy from the point of crease pattern design. Two powerful candidate works are discussed. One is to develop the crease pattern from tree structure; another one is to design crease pattern of approximate object. However, we think that there are still undiscovered, we try to aim the general methods of improving the crease pattern and consider the requirements that should be provided for the robot.
Some academic societies for education were interested in and studied the education of developments of solids. We can find their various contributions to the usual education of developments that is conducted with handicraft tools such as papers, scissors and pastes. On the other hand, computer environments in elementary schools are getting better, and therefore, the use of an electronic tool in the education of developments of solids can be regarded as an important means that leads to higher educational effect. A few electronic tools were developed, but an effect of class using such an electronic tool was not verified in terms of academic ability. We developed another electronic tool “TENKAI” for learning developments of a cube and a rectangular parallelepiped. To verify an effect of class using TENKAI in terms of academic ability, we set a control group and an experimental group, and conducted experimental classes on developments. The experimental classes were conducted with a normal method for the control group; and conducted with TENKAI for the experimental group. Consequently, the academic ability in the experimental group tended to be higher than that in the control group.