<![CDATA[Early symbolic thinking and early numeracy skills are essential foundations for cognitive development in early childhood; however, the utilization of interactive technology-based learning media in early childhood education institutions remains limited. This study aims to develop an interactive digital learning media called Ocean Adventure that is feasible and effective in stimulating symbolic thinking abilities in children aged 4–5 years. The study employed the Research and Development (R&D) method using the ADDIE model across five systematic stages: Analysis, Design, Development, Implementation, and Evaluation. The media was developed as a web-based application utilizing the Figma platform and tested at KB-TK Afkar and TK Kartika IV-80. The media integrates ocean adventure-themed animated videos with four educational games covering key indicators: counting 1–10, recognizing number concepts, recognizing number symbols, and recognizing letter symbols. Material expert validation yielded an average score of 91% (highly feasible), media expert validation reached 80% (highly feasible), and user (teacher) validation scored 97% (highly feasible). Small group trials produced a feasibility percentage of 88%, while large group trials achieved 98%, both categorized as highly feasible. The findings demonstrate that Ocean Adventure media is highly feasible and effective for stimulating symbolic thinking skills in early childhood in an interactive and enjoyable manner. ABSTRAK Kemampuan berpikir simbolik dan literasi numerasi awal merupakan fondasi esensial bagi perkembangan kognitif anak usia dini, namun pemanfaatan media pembelajaran interaktif berbasis teknologi di satuan PAUD masih sangat terbatas. Penelitian ini bertujuan untuk mengembangkan media pembelajaran digital interaktif Ocean Adventure yang layak dan efektif dalam menstimulasi kemampuan berpikir simbolik anak usia 4–5 tahun. Metode penelitian yang digunakan adalah Research and Development (R&D) dengan menerapkan model ADDIE melalui lima tahapan: Analysis, Design, Development, Implementation, dan Evaluation. Media dikembangkan berbasis website menggunakan platform Figma dan diujicobakan di KB-TK Afkar serta TK Kartika IV-80. Media mengintegrasikan video animasi bertema petualangan bawah laut dengan empat permainan edukatif yang mencakup indikator membilang 1–10, mengenal konsep bilangan, mengenal lambang bilangan, dan mengenal lambang huruf. Hasil validasi ahli materi memperoleh persentase rata-rata 91% (sangat layak), ahli media sebesar 80% (sangat layak), dan validasi pengguna (pendidik) sebesar 97% (sangat layak). Uji coba kelompok kecil menghasilkan persentase kepraktisan sebesar 88% dan uji coba kelompok besar mencapai 98%, keduanya berada pada kategori sangat layak. Hasil penelitian menunjukkan bahwa media Ocean Adventure sangat layak digunakan untuk menstimulasi kemampuan berpikir simbolik anak usia dini secara efektif, interaktif, dan menyenangkan. ]]>
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