Here is a step by step process of one of my Widgets.
Step 1. I created a 3D cube, this will be the start of my Widget.
Step 2. By Using the line tool I created areas that I would then cut out using the Extrude Tool, This is the cube after the first Extrusion.
Step 3. Here I am creating the lines that I am then going to cut using the Extrude tool.
Step 4. Here is the last of the steps in my Widget, This is after it is completely cut out and finished.