Developing the early-year children's engagement is crucial to promote their interest in learning, particularly in the science-related lessons. This article reports about the engagement of 15 early-year children in a childhood education program in Jambi city Indonesia and their recognition of some scientific phenomena discussed during the lesson. A classroom case-study research design was used to collect data. The children were involved in talking about daily scientific phenomena using a question and answer (Q&A) method in four meetings for 60 minutes each. The data about the children's engagement during the lessons were collected using the Gutman-style classroom observations and the data about the science recognition of the children were collected from the voice-recorder-assisted classroom dialogues. The data about the children's engagement were analyzed using a quantitative method while the data about the children's science recognition were analyzed descriptively. The results showed that the children's participation increased during the lessons that encompass the aspects of listening to the teacher, answering and posing questions, and sharing personal interest. The results also revealed that the children had recognized six scientific phenomena that included the phenomena about pointed objects, air, water, temperature, mirror, and wings. These results inferred that the engagement of the earlyyear children can be enhanced by using the Q&A activities and involving them in a scientific-driven dialogue. These results also inferred that the early-year children had been aware about and recognized some scientific phenomena which were pre-existed in their daily life that need to be furtherly developed in class using appropriate teaching methods.