Activities such as the two presented hear can strengthen students' spatial visualization and reasoning.The explorative nature of the activities engages students at different levels in active thinking and problem solving. Using well-designed manipulatives such as Zometool and technology tools such as vZome software and The Geometer's Sketchpad helps students develop clear mental images of the two- and three-dimensional geometric objects, which are not easily constructed otherwise, and of their mathematical properties and relationships. Further, encouraging different way of approaching a problem helps students become stronger and more flexible in working in various problem situations.