Free application designed to create computer models from Lego blocks. The program contains as little text as possible, so that small children will not have the slightest problem with creating their Lego models. The whole thing can be controlled with the mouse, but there are also defined keyboard shortcuts for most of the available options.

Finished projects can be saved as an image (BMP, JPG), and even used as elements of subsequent models. BlockCAD is not a typical CAD application offering only the ability to stack blocks one on top of the other and rotate them 90 degrees. However, this does not limit fun.