The availability of low-cost and powerful mobile devices and 3D modeling and visualization tools provides new opportunities for bringing innovation into mathematics education. This paper reports on the findings from a mobile geometry project pilot for middle school students designed together with teachers that consisted of outdoors and indoors activities. The aim of the project has been to design and implement a prototype that combines mobile and 3D technologies that allow students to collaboratively, explore, and discuss geometrical concepts. The focus of this paper is to present and reflect on the lessons we have learned after experimenting with novel pedagogical activities that rely on mobile applications, 3D modeling and visualization to support learning in the field of geometry. Finding a balance between team goals and expectations while focusing on the learning activity flow can lead to more innovative solutions.