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Learning that is still monotonous, limited creative and innovative teaching materials and teaching and learning activities that are less fun are obstacles to achieving the physical fitness goals of students. The purpose of developing electronic modules with physical fitness materials based on play activities for students at the elementary school level is to develop electronic modules through play activities and improve the physical fitness of students at the elementary school level. This type of research is Research and Development which consists of potential and problems, data collection, product design, design validation, design revision, product trial and product revision. This study involved 64 students from 3 schools, 3 lecturers (material experts, linguists and media experts) and 2 sports teachers at the elementary school level. Physical fitness data collection using the Nusantara Student Fitness Test. The results of the study 1) The creation of an electronic module of physical fitness material based on valid and reliable play activities, 2) Can improve the physical fitness of students through fun play activities. Electronic modules as part of technological developments can be used directly by society at large for the purpose of physical fitness, so that future researchers can provide more detailed aspects of physical fitness. Keywords: Electronic module; physical fitness; Play Activities; Healthy    

Purpose - During the past decades, several researchers have introduced devices that use sonar systems to detect and or to determine the object location or to measure the distance to an object using reflected sound waves. The purpose of this paper is to use sonar sensor with textile structure and to test it for detection of objects.Design methodology approach - In this study, a sonar system based on intelligent textiles approach for detection of objects has been developed. In order to do this, ultrasonic sensor has been integrated to textile structures by using conductive yarns. Furthermore, an electronic circuit has been designed; PIC 16F877 microcontroller unit has been used to convert the measured signal to meaningful data and to assess the data. The algorithm enabling the objects detection has also been developed. Finally, smart textile structure integrated with ultrasonic sensor has been tested for detection of objects.Findings - Beam shape is presented related to identified object and compared with the actual one given in sensor's datasheet in order to test the efficiency of the proposed method of detection. The achieved results showed that the determined beam pattern matches with the actual one given in its datasheet. Therefore, it can be concluded that the integration of sensor was successful.Originality value - This is the first time in the literature that a sonar sensor was integrated into textile structure and tested for detection of objects.