“…According to Yusuf & Nurihsan (2006), elementary period can be called an intellectual stage, which is a realistic stage, curious about something and learn. Games are a way of learning that can be done in elementary schools to increase students' knowledge and understanding, which will then shape behavior (Basiroen, Purbasari, & Yuliana, 2021;Dzakirotillah, Suwerda, & Istiqomah, 2018;Frost & Wortham, 2021;Jørgensen, Madsen, & Laessøe, 2018;Kamid, Sofnidar, Septi, & Citra, 2021;Munthe, 2020; van Amstel & Teixeira Carneiro, 2020;Yudianto, Mukarromah, & Yani, 2012). Several studies have also reported that knowledge interventions on how to sort waste through games have been able to improve knowledge and practice of good waste sorting (Dzakirotillah et al, 2018;Gunn & McCallum, 2005;Pavlátová, 2017;Solikha, Suchainah, & Rasyida, 2020;van Amstel & Teixeira Carneiro, 2020).…”