A rod and connector toy construction set, especially for use by young children. After a first electrode 11 and a second electrode 12 of the photo-sensing element are made of polycrystalline silicon film, a light receiving layer 13 of the photo-sensing element is prepared by amorphous silicon film on upper layer. The cached LBA ranges are scanned for segments having LBA ranges overlapping with an LBA range of a host command. The supporting part of the operating mechanism slidably supports the panel, while a second slide is provided, which is capable of moving the panel with respect to the supporting part by a connecting part. The edit server then sends requests to the code server for requested portions of the source code.