Research shows that using the digital resources and hands-on activities helped children learn important computational thinking and STEM concepts. STEMtastic Adventures allows children to play two different games: Better Building and City Walk. In Better Building, children sort and label blocks to help build more efficiently. In City Walk, children provide a sequence of directions to deliver gifts to happy recipients. Each of these adventures promotes computational thinking skills, while also engaging with relevant mathematics concepts and science practices. City Walk promotes: -Computational Thinking. Identify a precise set of steps/instructions to achieve a goal or solve a problem. Identify an error and determine how to fix it. -Math concepts. Provide directional commands that allow others to navigate pathways. Use spatial vocabulary such as left, right, forward, and backward. Better Building promotes: -Computational Thinking. Label groups of objects by identifying important information that should be highlighted in the label while ignoring details that are not necessary to describe the group. -Science practices. Identify characteristics that are similar and different across objects. Determine characteristics by which to sort objects. Sort objects into groups given specific characteristics. App features include: -Multiple level gameplay -Adaptive feedback -Based on research-based early learning trajectories Copyright This app is licensed under the following licenses: https://creativecommons.org/licenses/by-sa/3.0/ https://creativecommons.org/licenses/by/4.0/ https://www.gnu.org/licenses/gpl-3.0.html This material is based upon work supported by the National Science Foundation under Grant DRL# 1827293. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.