To engage parents and young children in exploring science together, media producers from WGBH (Boston’s public media station) and researchers from Education Development Center (EDC) collaborated with two home-visiting organizations—Home Instruction for Parents of Preschool Youngsters (HIPPY USA) and AVANCE—to design and test PEEP Family Science, an app-based intervention with science-focused digital media resources and associated supports for diverse, low-income families. Both organizations target families whose children do not attend preschool. These home visiting organizations play a unique