Quincy Family, Youth & Technology For Lifestyle Change (FYT-4-LIFE) Study

The goal of this pilot study is to evaluate and compare the feasibility and effectiveness of two platforms, text messaging and Facebook, for delivering an evidence-based, family-centric childhood obesity intervention to parent/guardians of children between the ages of 3-6 with a BMI of 90th percentile and above. The investigators hypothesize that the use of both platforms for delivering a childhood obesity intervention will help establish healthier family routines and be equally engaging and accepted by parent/guardians and children. The primary aim of this study is to assess the effect of the intervention on: * Parent/guardian knowledge of healthy family routines (i.e., nutrition, frequency of family meals, child's screen time, bedtime routines, physical activity, and sleep hours) and of parenting strategies that are preventive of child overweight and obesity * Parent/guardian readiness, confidence, and perceived self-efficacy to make and maintain changes in family routines known to be associated with healthy weight outcomes The secondary aims of the study are to assess the effect of the intervention on: * The adoption of healthy family routines and parenting strategies that are preventive of child overweight and obesity * Daily objective physical activity in the index child by accelerometry (using a physical activity tracking device) * Index children's BMI percentile, using data collected during regular clinic visits from the electronic medical record * To assess the level of engagement with the intervention, measured via daily activity tracker wear by the index child, parent/guardian views of Facebook posts or responses to 2-way text messages