This study was conducted to determine the content validity of the interest assessment instruments and students' interest in physical fitness activities. Researchers will determine the validity and reliability of the Children's Attractive to Physical Activity (CAPA) questionnaire to assess the child's interest in physical fitness activities to ensure the validity of the items (instruments) to be defensible, accurate, appropriate and relevant to the study, and usability and can provide meaningful information. The results of this study show that children's Attraction to Physical Activity questionnaire (CAPA) has a high literacy content value of .78. and the value of the true expertise of the field expert is .77. Therefore, the correlation value of questionnaire reliability was obtained through the Cronbh Alpha method of r = 0.76. This can be explained that the contents of the Children's Attraction to Physical Activity (CAPA) questionnaire are very relevant to use.
The development of SPARK (Sport Play Active and Recreation for Kids) program is an effort to improve physical fitness activities among school children. In addition, the development of this program is planned and systematic activity that will help children express ideas freely, especially in the Physical Education or during Co-curriculum activities. In this study, the validity of the SPARK program is based on the Sidek & Jamaludin (2005) module. The SPARK (Sports Play Active and Recreation for Kids) content creation process begins with the goal and concludes with a draft union. In the initial stages of the content development, researchers determine the purpose and objective of this program. Besides that, Researchers determine the appropriate types of activities are applied to enhance the physical fitness activities for the students. Therefore, the development of the SPARK program is through two phases, namely program construction and validity of content. Therefore, the results of the expert assessment on SPARK (Sport Play Active and Recreation for Kids) program content have a high content legality value of .78. This value can be explained that the SPARK program (Sport Play Active and Recreation for Kids) is highly relevant to the learning and teaching process for Physical Education subjects, co-curricular activities and it is ideal use in this research. In conclusion, the program is expected to provide opportunities for children to undergo natural learning through cognitive social theories that contribute to the learning and teaching process for Physical and Health Education subjects to see the impact on the involvement of children's physical activity.