The Growing Well Study

Inclusion Criteria: * Children aged 6 months-4 years along with their parents or guardians who reside in or near one of the three study locations and planned fieldwork sites: Leeds, Doncaster, or East London. For East London, eligibility includes individuals living in or near Tower Hamlets or an adjacent borough * All participants are eligible regardless of background, language, educational ability, or literacy level. Exclusion Criteria: * Plan to move outside of the study area within the next 12 months * Children not living with the consenting parent/guardian for any part of the week or not living with the consenting parent/guardian at the time of data collection (e.g. in care, hospital, or living wholly with another family member). * Children with significant oral feeding difficulties (e.g. tube-feeding or developmental delays) * Children that have been diagnosed with a long-term condition that affects their growth or development (e.g. hormonal or genetic conditions) * Children from subgroups where quotas have been filled will be excluded to maintain balanced representation across all study groups (e.g., age 3, non-deprived locations).