Skij is a Scheme interpreter written in Java. Its strong points in comparision with other existing Scheme-in-Java implementations are its small size and its facilities for manipulating Java objects and controlling the Java environment. Skij includes extensions to Scheme that permit fully interactive dynamic invocation of methods on arbitrary Java objects; interfaces to threads and synchronization; and support for writing UI event callbacks in Scheme.Skij was designed to bring the hands-on interactive feel of Lisp programming to the Java environment, and its primary use is as a debugging, exploration, and scripting tool. It can also be used for application development where speed is not critical.