Abstract: This paper will explain how the Multi-touch technology presents a wide range of new opportunities for interaction with graphical user interfaces, allowing expressive gestural control and fluid multi-user collaboration through relatively simple and inexpensive hardware and software configurations. We as the developers of the low cost multi-touch table draw our experience to provide the practical knowledge to build and deploy applications on the multi-touch surface. This will include the hardware and software requirements, comparison of various optical techniques and implementation of the multi-touch surface.