Improving the quality of human resources is an important aspect of realizing the vision of “Golden Indonesia 2045.” Stunting continues to pose a significant obstacle to the preparation of a superior and quality generation. In 2022, Indonesia’s stunting prevalence was 21.6%. According to the 2023 Indonesian Healthcare Survey (SKI), the prevalence of stunting in Bone Bolango Regency is 27.1%, which is far from the government’s target of 14% in 2024. Stunted children are 11.98 times more likely to have low-quality motor development. Malnutrition and mothers’ early marriages are among the many factors that influence stunting. Early marriage among mothers is the leading cause of stunting; 43.5% of early marriages are with girls aged 14–15 years old. The research was conducted cross-sectionally through direct examination of psychomotor movements in 30 children aged 3–24 months, which were adjusted to the psychomotor skills of children at the same age, and interviews were conducted with their mothers regarding the age of their marriage and the child’s eating patterns. The analysis was conducted with logistic regression using SPSS. The hypotheses are that the mother’s age of marriage and the child’s eating patterns simultaneously influence the child’s psychomotor skills. The research findings revealed that there were five babies with psychomotor abilities who did not match their age, as well as 12 mothers who were married under the age of 20 and had poor diets. The age at marriage significantly influenced the child’s psychomotor skills (P-value 0.034) and eating patterns (P-value 0.045) through partial logistic regression analysis. The Nagalkerke R Square and Cox & Snell R Square values show that marriage age influences children’s psychomotor skills by 37.5% and diet influences children’s psychomotor skills by 23.8%.