This session invites the audience to go, go, go on an adventure with The Cat in the Hat through an in-depth look at the development of The Cat in the Hat Builds That app, an adaptive, playful learning experience based on the PBS KIDS series, The Cat in the Hat Knows A Lot About That! Developed under a Ready To Learn grant to the Corporation for Public Broadcasting and PBS through the U.S. Department of Education, this app is designed to engage preschoolers in science inquiry and engineering design, promote positive mindsets and attitudes in science and engineering, while teaching core science concepts and practices. Observing, documenting, building, improving, reflecting- these are all actions that we purposely designed play experiences around. Second was to create an adaptive and personalized learning experience. This app empowers preschoolers through personalized play and guides preschoolers through adaptive play, where the games tailor to an individual learner’s progress. Lastly, (pending research availability) we will discuss the multiple research agendas we are conducting to help us see the overall efficacy impact of the app through its inquiry & engineering curriculum and approach, adaptive and personalized learning and lastly, how it might impact a preschoolers overall view on science.