Computational thinking is a necessary skill for human life. However, promoting this competency in primary school students sometimes is hard and difficult for instructors. This article proposes a learning approach based on the use of a platform as part of a strategy of computational thinking to enhance learning of geometry. A case study was performed with primary school children from fourth grade at the Comfacor School (Montería-Colombia). The aim of the study was to analyze the effects of the approach in the children's motivation and performance.