The purpose of this study is to investigate the impact of practice-based STEM instruction on the development of younger students' research abilities and the improvement of their analytical skills. Both quantitative and qualitative methods were used in this study. There were 72 participants in the 4th grade from the elementary school "Zhas Daryn-2" in Shymkent (South Kazakhstan). According to research findings, successful implementation of STEM practices requires an educational program that includes preparation, implementation and evaluation phases. Additionally, it was found that a STEM-focused educational program helps younger students increase their research abilities more effectively. The study's findings also show that STEM projects and research work help to identify, explore and solve problems through research activities leading to enhanced research and analytical skills. Despite this, STEM students often have difficulty staying focused on acquiring new knowledge and abilities, keeping up with recent technological advancements and comprehending the different difficulties that surround their significance. According to the research findings, teachers in primary school can use the outcomes of practice-based STEM training to support younger students' research abilities' manifestation and the improvement of their analytical skills.