This archive contains three projects using the LEGO WeDo robotics kit. In addition to the Scratch projects which are rather simple, each project in the archive contains a document (in both PDF and DOC formats) that describes the construction of the LEGO projects in detail together with numerous closeup photos.
Download from Google Code at the project "scratch-karel" that includes other robotics projects: Karel the Robot in Scratch and BYOB/Snap! and Braitenberg's robots in BYOB/Snap!