Lol yes they are: the black "holes" on the power points are really just rectangular prisms and the switches are just rotated rounded boxes. Other than that its pretty much self explaining. Oh also the 'prongs' of the plug took a while, i just used a lot of triangles. Unfortunately I had to do everything here twice, because calling things Power-point, Power-plugs gets very confusing and overwriting issues occurred =P

Transparency is controlled using the 4th variable of a colour (its red,green,blue,alpha - or something similar). Alpha is a number between 0 and 1, where 1 is opaque and 0 is completely transparent. To make something's transparancey to the alpha value go to component material (left side - as apposed to document structure or sliders) and its under 'Opacity' (down the bottom). Set that to 'constant alpha'