The Open Geoboard is an upgrade to the classical geometric board. The enhancements we have introduced are: high-precision machined wooden removable pegs and a plywood board with high resolution grid of holes, ergonomic pegs of different height (transforming it into the first 3D geoboard) and various paper templates that change the board’s application when placed on top of the board. We propose a workshop which reveals the extended capacity of the “Open Geoboard” as a tool for creating exciting 2D and 3D interdisciplinary projects. The workshop combines hands-on activities with different teaching techniques like demonstration, guided insight and free improvisation. It is suitable for students above 8 years of age, parents and teachers in primary and high school.