Students strengthen 3D spatial visualization by constructing cube towers that match given 2D side-view representations. Learners press the plus and minus buttons to add or remove cubes from a virtual structure, checking their work against front, side, and top views until the construction is complete. The activity automatically verifies solutions and generates a new random construction to solve next.
Skills: spatial reasoning, 3D visualization, perspective-taking, problem-solving. Grades K-5.