<![CDATA[development because it supports body coordination, balance, strength, confidence, and children’s participation in learning activities. Preliminary observations at RA Ar-Rahman Ciantra, South Cikarang, indicated that several children aged 4–5 years still had difficulty running, jumping with two feet, maintaining balance, and performing throwing or catching movements. This study aimed to develop the Petualangan Gerak Ceria storybook, determine its feasibility, and describe its implementation as a medium for stimulating gross motor skills. The study employed a Research and Development approach using the ADDIE model, which consists of analysis, design, development, implementation, and evaluation. Data were collected through observation, interviews, documentation, expert-validation questionnaires, and implementation assessment sheets. The product was validated by material, media, and instrument experts, followed by a small-group trial involving five children and a large-group trial involving ten children. Quantitative data were analysed using percentage scores based on a four-point Likert scale, while qualitative comments were used to revise the product. The material expert assessment reached 97.5%, while the media and instrument assessments each reached 100%, all categorised as highly valid. The reported implementation results were 86.70% in the small-group trial and 94.12% in the large-group trial. Children showed increased enthusiasm, active participation, and greater confidence in following movements embedded in the storyline. The storybook is therefore highly feasible as an alternative learning medium for stimulating gross motor skills in children aged 4–5 years.]]>
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