Many artefacts of our archaeological heritage are today preserved only in a fragmented manner. The reassembly of the original object is thus a central archaeological task. This project involves for the first time the intellect of many users in the reassembly process and combines it with computer-aided methods. We develop a web-based interactive 3D environment that allows users from the broad public to participate in the reassembly process of virtual fragments in a collaborative and playful manner, while raising awareness for the importance and sensitivity of our common cultural heritage.