OK, time for the "I Love Me" wall conversation.
During every step throughout your military career, you will be presented with plaques, memorials, photos, Awards/Decs, etc. Particularly when you: leave a current station ("Thanks for your hard work. Here's a piece of wood and a litho we all signed"), make a major milestone ("Congrats on graduating Basic / School / any and everything. Congrats on not getting in trouble and making O-3"), win an award ("Congrats. You're the Company officer of the Quarter for the office. The only other guy eligible won it last quarter, so it's your turn").
The question becomes, "What do I DO with all these things?" Some things you WANT to keep around the house / office / Mom's and Dad's place; the BIG important things like Academy diplomas, your Rating certificates (i.e. Pilot / Nav / Jump / whatever floats your boat (so to speak)), and some pictures IMPORTANT TO YOU. These are the types of things you pay good money for to get in nice frames. set up front and center in your living room. Some recent things you accomplished you might also want to proudly display (Me commisioning my son a couple of months ago is a great example, and hanging right in front in my office). These things may change over time as you accomplish more / get more stuff; AND, you really don't have to get them professionally framed. Walmart / Target have very nice frame sections.
It becomes what we jokingly call your "I Love Me" wall (or in my house, my "I Love Me" office; 25+ years serving, you collect A LOT!). Put up there what is important to YOU, Proudly display it! And you know what, that can change over time; some things important now may be overshadowed by greater things later; your closet or attic eventually becomes full of this kind of stuff.
BL: If the OP wants to frame their Son's LOA, why the heck not! It's a great achievement he accomplised NOW, something they should be proud of NOW. If things change, simply take it down. In 4 years when he graduates, replace it with his diploma. In fact next summer, when he's off to somewhere to do something and has pictures of it, replace it with those then. It's your home, your kid, do what makes YOU happy (He'll get a chance to display what HE wants in HIS house later).
I will say this, however. Posters on here are correct, when he gets farther along, his LOA won't be that big of a deal when compared to other, more worthy, accomplishments (lie his diploam, as stated). So, go to Target, get a nice cheap frame, and put his LOA whereever you want to display it, you should be prooud of this accomplishment and have every rigth to show it. But, it will probalby be gone next year with photos of him jumping out of airplanes, in a funky uniform with a funky hat ("Is that horse hair?"), whatever.