This study aimed to develop and evaluate the acceptability and feasibility of a web-based platform for parents to support preschoolers' development of physical literacy. Specifically, this intervention focused on children's motor and social-emotional skill development. Twenty parents (M[subscript age] = 35.7, SD = 4.2) of preschool-aged children (M[subscript age] = 4.1, SD = 0.6) were assigned three intervention modules and completed weekly usage and feedback questionnaires (1 = strongly disagree, 5 = strongly agree). Parents (n = 15) also completed a follow-up interview. Parents indicated the modules were useable (4.5/5), useful (4.5/5), feasible (4.4/5), enjoyable (4.5/5), and acceptable (4.5/5). Five themes underlying parental engagement were generated: (a) "activity organization and planning," (b) "(de)motivators," (c) "parent knowledge and skills," (d) "experience with the platform," and (e) "application to everyday routines." The online modules under investigation were deemed both acceptable and feasible by parents. However, factors such as time and knowledge may impact parental engagement at home. Future research is needed to better understand the antecedents to parent physical literacy support behaviors in the early years.