We have developed a circuit board using materials that are inexpensive and familiar to elementary school students. Most of the responses from students who made this board were relatively positive and we observed them enjoy making the boards at a Science Festival in Japan and in elementary school. As an application, we also developed a tiny torch using similar materials and a similar method. The method of making the board and the torch are explained in detail, and the characteristics of the board are presented along with students' impressions. (Contains 8 figures.)