<![CDATA[This research is motivated by the low environmental awareness among children aged 5–6 years, which is shown through behaviors such as throwing garbage in the wrong place, being unable to care for plants, and leaving garbage after activities. One effort that can be done to instill an environmental awareness is through the use of loose parts media that utilizes natural materials and used goods as a medium for playing and learning. This study aims to determine the environmental awareness attitudes of children aged 5–6 years before and after being given loose parts media, as well as to determine the effect of the use of loose parts media on the environmental awareness attitudes of children aged 5–6 years at the FKIP UNRI Lab Kindergarten. This study uses a quantitative approach with an experimental method and a Pre-Experimental Design in the form of a One Group Pretest-Posttest Design. The research sample consisted of 16 children aged 5–6 years who were determined using a total sampling technique. The data collection technique used observation with an environmental awareness attitude instrument. Data analysis was carried out using a normality test, a homogeneity test, a paired sample t-test, and a normalized gain test. The results of the study showed that children's environmental awareness before being given treatment was in the category of Starting to Develop (MB) with a range of 0–50%, while after being given treatment using loose parts media, it was in the category of Developing According to Expectations (BSH) to Developing Very Well (BSB) with a range of 76–100%. The results of the paired sample t-test showed a calculated t value of 22.223 which was greater than the t table of 1.746 with a significance value of 0.000 <0.05, so there was a significant difference between the pretest and posttest results. The results of the normalized gain test showed an increase of 70.34% which was in the high category. Thus, the use of loose parts media had a significant influence on the environmental awareness of children aged 5–6 years at the FKIP UNRI Lab Kindergarten.]]>
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