Lately, people spend a fair amount of time with Online Social Networks. Real encounters, especially with non-related people, tend to not be encouraged any more. In this scenario, we present an application involving virtual and physical elements aiming to help people start an interaction. The presented application encompasses the use of a large video display, users' mobile devices, a projector and a micro controller for a water pump connected to a small real garden in a box. Using their smartphones collaboratively, people can fill out a virtual water container and, once the container is full, they can release the water from it, watering the real garden as a consequence. Initial observations suggest that the introduction of physical objects on an interactive system helps users understanding and using it. Besides, the possibility of causing a real effect from a virtual interaction is effective at attracting passerby users to interact with it.