The "Click the Cube”-App provides students with opportunities to develop spatial ability using cube nets. Three different learning environment have been developed, each focusing on different aspect of spatial ability in the context of cube nets. In the first learning environment a student has to decide if the illustrated net is a cube net or not by mentally folding the net. In the second learning environment a net has to be supplemented with a sixth square, so that a net results in a cube net. In the third learning environment the student has to dye the cube net according to a given colorful cube by rotating the cube. The environment includes several motivating elements for the students, such as collecting stars in order to receive a medal. Different differentiation elements are also provided, such as a slider, to help the student slowly build mental images of a cube.