Educational institutions planning to invest in Educational Robotics are faced with a wide selection of products. Yet, we have not been able to find any review studies on the effect of these products, to guide the institutions to get the most out of their investments. For this review, 29 Educational Robotics products were therefore selected, and eight major databases were searched for effect studies involving these. The search yielded 301 results, of which 17 were selected for synthesizing. The studies and their respective findings are discussed in the review. Unfortunately, there were not enough studies to compare the effect of the products and more research is therefore needed. In addition, the studies methodologies and design have been analyzed, and a series of recommendations for how future experimental/quasi-experimental studies within the field can be design and conducted, have been established.