Muhtarom and Sartika, I.D. 2025. Development Of Socialisation Materials On The Negative Impact Of Smartphones On Early Childhood: Guidance For Teachers Who Are Members Of IGRA. Raudhatul Athfal: Jurnal Pendidikan Islam Anak Usia Dini. 9, 2 (Dec. 2025), 107–121. DOI:https://doi.org/10.19109/ra.v9i2.30665.