Use the Fashion Authority Mod to assign this outfit as a situational requirement for school lots, forcing all child Sims to wear it when they arrive.
Often includes a clean, preppy look such as white shirts, trousers, or blazers with ties. Basic Kids Uniform Boys - The Sims Resource
If you have Get Together , create a "School Club" and set this specific McLayneSims uniform as the Club Outfit . This ensures all boys in the club automatically change into it when the "school day" (club gathering) starts.
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