This paper aims to explore the agency trajectories in 16 babies (58 % girls; M= 11 months, SD=2) during their interactions with teachers and objects, while they are engaged in pedagogical events.This research was conducted in two public preschools in Cali, Colombia.We used a mixed methods approach to analyze filmic records videotaped for five mornings, capturing preschools' routines.Afterwards, we qualitatively coded interaction sequences for each participating child, using the video annotation coding system ANVIL 5.0.We defined an interaction sequence as a process initiating with a searching behavior, the access to the object, its exploration and abandonment, closing each sequence.Finally, we estimated agency trajectories using STATA 12.O.Our results suggest four agency trajectories, only one of them having favorable results for children agency development.We discuss the role of educational practices in institutional contexts during early development and its implications on children's agency.