In response to the problems experienced during the practice of the current ELT curriculum and the requirement for an authentic language learning environment, a unique English language teaching curriculum was designed for young learners in the present study. The curriculum was rooted in Krashen's Natural Approach and adopted an eclectic curriculum design model. This article aims to show the findings of the micro-level implementation (field testing) of the newly designed ELT curriculum. The implementation of the designed curriculum was carried out in a public elementary school in Ankara for three instructional hours. The purpose of the field testing was to identify the strengths and weaknesses of the curriculum, allowing for necessary adjustments and revisions before its broader implementation. Field testing showed that when students were exposed to substantial amounts of comprehensible input using engaging and relevant materials, without being pressured to immediately engage in production practice, they eagerly participated in the lesson. In addition, this study showed that successful implementation of an ELT curriculum necessitates thorough and diligent planning and preparation from teachers. Moreover, the study revealed that researchers possessing a solid understanding of the underlying principles of the curriculum and actively participating in the design process play a crucial role in the productive implementation of the program. This program should be implemented on a larger scale to have a more thorough understanding of the strong and weak aspects of the designed curriculum. [This paper was published in: "EJER Congress 2024 International Eurasian Educational Research Congress Conference Proceedings," edited by Senel Poyrazli, Ani Publishing, 2024, pp. 214-219.]