Summary The proposed study will modify and test an intervention to reduce unintentional injuries among Latinx children by teaching their caregivers to supervise their young children (ages 2-5 years) more effectively. The study will include 5 steps. In step 1, we will conduct focus groups with Latinx families and staff from Latinx resource centers to identify modifications that need to be made to the intervention materials. In step 2, we will make modifications to the intervention materials based on focus group feedback. In step 3, we will conduct a second round of focus groups with Latinx caregivers and staff from Latinx resource centers to determine if additional modifications need to be made to the intervention. In step 4, we will pilot test the modified intervention with Latinx families and will make final modifications to the intervention. Finally, in step 5, we will test the effects of the modified intervention on caregivers’ supervision and children’s injury frequency among Latinx families. We will recruit participants from Latinx resources centers in three communities in Southwest Michigan. We will also recruit families from a local Head Start program. We will use a randomized controlled trial methodology to examine the efficacy of the intervention to increase caregiver supervision and reduce and child injuries. Self-report and observational data on supervision will be collected at pretest, post-test and at a 1-month follow-up. Data on child injuries will be collected at pre-test (for the previous 2 week period), during the 3 week intervention, and during a 4-week follow-up via brief weekly telephone interviews with caregivers.