Why do we have seasons? Why do we have day and night? These questions drove a recent investigation in fourth grade. Students were provided with the materials and given a brief introduction of Earth’s axis before hand. Then, with models presented, students were asked to make a hypothesis to answer these questions. Fourth graders discussed, experimented, evaluated and finally made and supported their conclusions, as I stood by for guidance. Students could soon clearly “see” what causes seasons… Due to the Earth rotating on its axis at an angle of 23.5 degrees while it revolves around the sun, at times, we, in the northern hemisphere, are angled towards the sun (summer) and at other times, we are angled away from the sun (winter). In turn, the constant spinning of Earth causes day and night.