This research aims to determine the impact of the Riko the Series on the learning outcomes of elementary school students in the water cycle material. The learning outcomes referred to in this study pertain to the achievement at the level of conceptual understanding in the cognitive domain. This is a quantitative study with quasi-experimental research as its method. The research utilizes a Nonequivalent Control Group design, involving pretest and posttest assessments in each group, with the population being all fourth-grade students of elementary school of Negeri Sukaraja 1. The sampling technique used is purposive sampling The sample consists of 31 students from Class IV A and 31 students from Class IV B, both from elementary school of Sukaraja 1. The preliminary findings indicate a significant impact on the learning outcomes of elementary school students in the water cycle material, whether or not the Riko the Series is used. Subsequent research findings reveal that the learning approach involving the Riko the Series leads to better learning outcomes, as evidenced by higher average scores. However, when comparing the learning outcomes between the experimental and control groups, no significant impact is found. To measure the influence in more detail, an effect size calculation is performed. The result of the effect size calculation, based on Cohen's D criteria, considering the entire population of fourth-grade students at elementary school of Negeri Sukaraja 1 Sumedang, suggests that the Riko the Series has a low impact on the learning outcomes of elementary school sukaraja 1 Sumedang with an effect size of 0.254.