Treinta Millones de Palabras- Visitas al Hogar (TMP) is designed to intervene upon mothers' knowledge, beliefs, and behavior, which in turn influences their interaction with their children, impacting children's development. The investigators will measure change in mothers' knowledge, beliefs, and behavior during and after intervention, and measure impacts on children's development across major developmental domains. Specifically, the investigators will measure mothers'

1. Knowledge of child language development and the role of parents in that development
2. Beliefs about the malleability of intelligence and their role in shaping their children's intelligence
3. Interaction with their child, specifically their linguistic input and responsiveness to their child's communication

Concurrently, the investigators will measure children's

1. Emergent oral language development, in both Spanish and English
2. Social-emotional development
3. Math and spatial reasoning skill development

Inclusion Criteria:

• participants (i.e. parents and their children) who live at or below 200% of the federal poverty line,
• female caregivers with a child between the ages of 24-30 months old,
• participants whose preferred home language is Spanish,
• education level is less than or equal to a bachelor's degree.

Exclusion Criteria:

• participants (i.e. parents and their children) who live over 200% of the federal poverty line,
• parents under the age of 18,
• non-female primary care giver
• children younger than 24 months old or older than 30 months old (at start of study),
• parents who do not have legal custody of their child,
• parents whose child does not live with them,
• parents who are not with their child at least two full days per week,
• parents who are unable to commit to the intervention requirements,
• foster parents,
• children with significant cognitive or physical impairments, (specifically Autism Spectrum Disorder, Epilepsy, Cerebral Palsy, hearing impairment, Down Syndrome and blindness),
• parents who have earned or are currently working toward a graduate or professional degree (e.g. M.A., M.S., M.B.A), and
• parents whose preferred home language is not Spanish.

Participants will not be aware of which condition they are enrolled in.