Excellent.
All the examples should be like those you prepared with few widgets in order to not distract the beginners. Instead who has more experience will appreciate how it is simple to let appear a window with no effort in contrast to other well know GUI that are proude of their verbosity.
Of course some more complex example is welcome, but later. I invite the forum community to post some more elaborate example. Maybe treating some widget that has not yet been covered. I'm sure that in the MyApps assembly there are many experiements we have done. That code that we believe is useless can be instead very useful for beginners.