Update, November 2016. If nothing works (I think I’ll just give up on Java) then see this post on html5 versions of many of the applets.
Note – Oracle say “If you have problems accessing Java applications using Chrome, Oracle recommends using Internet Explorer (Windows) or Safari (Mac OS X) instead.” If you still get Java error messages even though you have an up to date version of Java installed, check that Java is enabled in your browser. It may be that you need to Configure Java (see your programs list) and under the Security tab add an exception site, eg: http://www.fi.uu.nl/wisweb/ (I left my security setting as high and this did solve the problem.)
Try Cube houses to build 3d models and generate different views.
First select drawing to see the view then select 3d-model to give you a model you can rotate and look at the different views.
There are eight different models you can explore (use the drop down menu).
You can add (build) or remove (break down) bricks and control the size of the square base.
Building houses with side views challenges you to construct 3D models given the plans and elevations; the task is made more challenging by specifying that as few cubes as possible should be used.