Includes modifications to Tony Buser's Thingiview.js (https://github.com/tbuser/thingiview.js) to allow dynamic 3D display of STL file in WISEngineering and WISE4. This incorporates an estimation activity, where students estimate attributes (such as side-length, surface area, or volume) of the shapes, using a reference. In this case, the reference is the woman from Google Sketchup: http://sketchup.google.com/ who happens to be roughly 5ft,6in tall. She is included in the STL file and renders as part of the shape on screen. The estimation includes a estimate-error-bar, just as is used in the Estimation Calculator: http://teacherlink.org/estimate/ This lets students know if an estimate is too high or too low, and provides an exact value if a student's estimate is close enough. This is a step-type, so the entire directory drops into: $CATALINA_HOME/webapps/vlewrapper/vle/node/ and, with some minor modifications to $CATALINA_HOME/webapps/vlewrapper/vle/node/setupNodes.js to include this path, the new step type will work. (there are still a few bugs to work out...) More info on customizeable step types for WISE4 / WISEngineering is here: https://github.com/WISE-Community/WISE-StepTypeCreator