Due to the lack of tools that can be easily used by practitioners, there is a need to develop acceptable embedded ways to assess children's fine motor skill development within early childhood education and care settings. This study examined the validity and reliability of a brief and ecologically valid fine motor assessment tool for preschool-aged children; the fine motor growth assessment (i.e., FINGA). Children's fine motor performance on FINGA was compared with widely-used and validated performance-based (Peabody Developmental Motor Scales 2nd edition) and informant-based (Ages and Stages Questionnaire 3rd edition) fine motor assessments. Ninety-one children [mean age (y) ± SD = 4.50y ± 0.68] were assessed within seven early childhood education and care services in New South Wales, Australia. Exploratory factor analyses (EFA) and linear regression analyses showed that FINGA had good internal consistency (EFA of 73%) and age sensitivity (B[subscript std] = 0.69, p < 0.001), and bivariate correlation analyses demonstrated good concurrent validity (rs from 0.69 to 0.84, ps < 0.001) against the two comparison assessments. Because of its brevity and ecological validity, the FINGA tool should be further examined as a routine fine motor skills assessment administered within the context of universal early childhood education and care service provision.