Many efforts are currently going towards networking smart things from the physical world (e.g. RFID, wireless sensor and actuator networks, embedded devices) on a larger scale. Rather than exposing real-world data and functionality through proprietary and tightly-coupled systems, several projects suggest to make them an integral part of the Web. As a result, smart things become easier to build upon and the scalability and evolvability of the Web can be leveraged. In this paper we look at “physical mashups”, were tech-savvy create lightweight, ad-hoc applications on top of smart things just as they currently create Web 2.0 mashups. We present the early version of a mashup framework that provides services for composing things and illustrate this by means of two mashup editors.