While I work in IT these days, I still do and have been and electrical engineer. Safety is obviously the key here, I would certainly not be willing to put that in my kids room for example without taking the proper precautions. Plastic sheeting is not a proper precaution. You can buy cheap cases from fleabay that would do the trick, or buy a sheet of 3mm Perspex and manufacture a case using hot glue and a dremmel to cur the holes as required. To fix the PCB to the Perspex use standoffs as already mentioned, which also cost pennies.

In many countries, insurance policies will not pay out if there is an incident with modified devices unless you have them certified by a qualified engineer. In most cases this does not cost much, but it is something to think about.

Looking at the logs I see

Error: ENOENT: no such file or directory, open 'package.json'
    at Error (native)
    at Object.fs.openSync (fs.js:642:18)
    at Object.fs.readFileSync (fs.js:510:33)
    at Object. (/home/pi/MagicMirror/js/app.js:15:32)
    at Module._compile (module.js:577:32)
    at Object.Module._extensions..js (module.js:586:10)
    at Module.load (module.js:494:32)
    at tryModuleLoad (module.js:453:12)
    at Function.Module._load (module.js:445:3)
    at Module.require (module.js:504:17)

Starting MagicMirror: v2.2.2
Loading config ...
Loading module helpers ...
No helper found for module: alert.
Initializing new module helper ...
Module helper loaded: updatenotification
No helper found for module: clock.
Initializing new module helper ...
Module helper loaded: calendar
No helper found for module: compliments.
No helper found for module: currentweather.
No helper found for module: weatherforecast.
Initializing new module helper ...
Module helper loaded: newsfeed
All module helpers loaded.
Starting server on port 8080 ... 
Server started ...
Connecting socket for: updatenotification
Connecting socket for: calendar
Starting node helper for: calendar
Connecting socket for: newsfeed
Starting module: newsfeed
Sockets connected & modules started ...
Launching application.
Create new calendar fetcher for url: http://www.calendarlabs.com/templates/ical/US-Holidays.ics - Interval: 300000
Create new news fetcher for url: http://www.nytimes.com/services/xml/rss/nyt/HomePage.xml - Interval: 300000
Can't parse feed item:
{ title: '',
  link: 'https://www.nytimes.com//?partner=rss&emc=rss',
  guid: { ispermalink: 'true', text: 'https://www.nytimes.com//' },
  'atom:link': 
   { rel: 'standout',
     href: 'https://www.nytimes.com//?partner=rss&emc=rss' },
  description: '',
  'dc:creator': '',
  pubdate: '' }
Title: 
Description: 
Pubdate: undefined
Can't parse feed item:
{ title: '',
  link: 'https://www.nytimes.com//?partner=rss&emc=rss',
  guid: { ispermalink: 'true', text: 'https://www.nytimes.com//' },
  'atom:link': 
   { href: 'https://www.nytimes.com//?partner=rss&emc=rss',
     rel: 'standout' },
  description: '',
  'dc:creator': '',
  pubdate: '' }
Title: 
Description: 
Pubdate: undefined
Can't parse feed item:
{ title: '',
  link: 'https://www.nytimes.com//?partner=rss&emc=rss',
  guid: { ispermalink: 'true', text: 'https://www.nytimes.com//' },
  'atom:link': 
   { href: 'https://www.nytimes.com//?partner=rss&emc=rss',
     rel: 'standout' },
  description: '',
  'dc:creator': '',
  pubdate: '' }
Title: 
Description: 
Pubdate: undefined

Decided to build a pi3 with Alexapi and MM. It all seemed to go well although I have yet to add the MM Alexa extensions.

The problem I am having is after installation PM2 starts MM fine using pm2 start MagicMirror.

If I then reboot I get the MM splash screen during boot but the application does not display. If I open a terminal and run pm2 start MagicMirror it shows online but nothing displays. I have to run npm start to get it to kick off. I am now at a bit of a loss as to what to do next.

Phill