ABSTRACT Low student interest in learning Natural Sciences (IPA), characterized by limited attention, participation, enthusiasm, and involvement, as well as the limited variety of learning media, provided the basis for this study. This study aimed to determine the difference in students’ learning interest between the use of Big Book and Busy Book media in the Classification of Living Things topic among seventh-grade students at SMPN 2 Sakra Barat, East Lombok Regency, in the 2025/2026 academic year. This study employed a quantitative approach with a comparative research design. The population consisted of all seventh-grade students, with a sample of 60 students comprising 30 students in the Big Book group and 30 students in the Busy Book group, selected using purposive sampling. The primary data were collected through a Likert-scale learning interest questionnaire, while observation was used to obtain information about the implementation of learning activities and student engagement during the learning process, and documentation was used as supporting research data. The questionnaire instrument was tested for validity, while the learning interest data were analyzed using descriptive statistics, a homogeneity test, and an Independent Samples t-Test. The results showed that the mean learning interest score of the Big Book group was 71.87 with a standard deviation of 8.557, whereas the Busy Book group obtained a mean score of 106.40 with a standard deviation of 7.020. The homogeneity test showed a significance value of 0.342 > 0.05, while the Independent Samples t-Test produced t = -17.089, df = 58, and Sig. (2-tailed) = 0.000 < 0.05. Therefore, there was a significant difference in learning interest between students who used Big Book and Busy Book media. The Busy Book group had a higher mean learning interest score, with a difference of 34.53 points compared with the Big Book group. These findings indicate that Busy Book can be considered an alternative interactive learning medium for Natural Sciences instruction, particularly in the Classification of Living Things topic, with the interpretation limited to the difference in learning interest identified in this study. ABSTRAK Rendahnya minat belajar siswa dalam pembelajaran Ilmu Pengetahuan Alam (IPA), yang ditandai dengan kurangnya perhatian, partisipasi, antusiasme, dan keterlibatan siswa, serta penggunaan media pembelajaran yang kurang bervariasi, menjadi dasar dilakukannya penelitian ini. Penelitian ini bertujuan untuk mengetahui perbedaan minat belajar siswa antara penggunaan media Big Book dan Busy Book pada materi Klasifikasi Makhluk Hidup kelas VII SMPN 2 Sakra Barat Kabupaten Lombok Timur Tahun Pelajaran 2025/2026. Penelitian menggunakan pendekatan kuantitatif dengan desain komparatif. Populasi penelitian adalah seluruh siswa kelas VII, dengan sampel sebanyak 60 siswa yang terdiri atas 30 siswa kelompok Big Book dan 30 siswa kelompok Busy Book, yang dipilih menggunakan teknik purposive sampling. Data utama dikumpulkan melalui angket minat belajar skala Likert, sedangkan observasi digunakan untuk memperoleh informasi mengenai keterlaksanaan pembelajaran dan keterlibatan siswa selama proses pembelajaran, serta dokumentasi digunakan sebagai data pendukung penelitian. Instrumen angket diuji validitasnya, sedangkan data minat belajar dianalisis menggunakan statistik deskriptif, uji homogenitas, dan Independent Samples t-Test. Hasil penelitian menunjukkan bahwa rata-rata skor minat belajar kelompok Big Book sebesar 71,87 dengan standar deviasi 8,557, sedangkan kelompok Busy Book sebesar 106,40 dengan standar deviasi 7,020. Hasil uji homogenitas menunjukkan nilai signifikansi 0,342 > 0,05, sedangkan Independent Samples t-Test menghasilkan nilai t = -17,089, df = 58, dan Sig. (2-tailed) = 0,000 < 0,05. Dengan demikian, terdapat perbedaan minat belajar yang signifikan antara siswa yang menggunakan media Big Book dan Busy Book. Kelompok Busy Book memiliki rata-rata skor minat belajar lebih tinggi dengan selisih 34,53 poin dibandingkan kelompok Big Book. Temuan ini menunjukkan bahwa Busy Book dapat menjadi salah satu alternatif media pembelajaran interaktif dalam pembelajaran IPA, khususnya pada materi Klasifikasi Makhluk Hidup, dengan interpretasi terbatas pada perbedaan minat belajar yang ditemukan dalam penelitian ini.