The first step of photosynthesis occurs when plants capture sunlight in their chlorophyll, a special type of cell that only plants have. The chloroplast in chlorophyll is what gives plants their distinctive green color. Thus, when creating stations for photosynthesis, the first station can have a green, leafy plant and an image of chloroplast so that students can make the connection between what they see everyday (the leaves of a plant) and the microscopic cause.
Once light is captured by chlorophyll, it excites electrons within the chloroplast that lead to the creation of adenosine triphosphate (ATP) and adenosine diphosphate (ADP), chemical compounds that are essential for transferring energy and stimulating cell growth. Additionally, water is present during these reactions, and water is broken down into hydrogen and oxygen during light-based reactions. This is the step of photosynthesis that can start to get complicated for students; one good way to present this as a station is to have visual examples of ATP, ADP and water -- it is more important to focus on products (water and light) and end results (ATP and ADP) than the specifics of the process.
After light-based reactions, ATP and ADP combine with carbon dioxide in a process known as the Calvin Cycle (which is referred to as a "dark reaction" because sunlight is no longer needed at this stage of photosynthesis). The end result of the Calvin Cycle is the creation of glucose, which is the sugar used to "feed" the rest of the plant's activities and growth. Again, the Calvin Cycle is complicated for beginning students, and thus a station in the classroom should focus on the key points, especially on how this is the stage where carbon dioxide becomes important in photosynthesis.
After students have gone through two complex stations on the details of photosynthesis, a final station should summarize the process. One way is to give the whole equation of photosynthesis, which effectively breaks down to 6H2O + 6CO2 = C6H12O6 (glucose) + 6O2, with the process being powered by light in the first stage and ATP in the second stage. Additionally, students should understand the importance of photosynthesis in our lives. Besides keeping plants alive (and thus forming the basis of the food chain), photosynthesis also creates oxygen for us to breathe, and takes in carbon dioxide.