recording sound

I am getting on now and I have a number of older videos of Weddings, holidays etc and being nearly the last of this generation there will be people on the films future generations, including my granddaughters, 12,4.5 and 2.5 who will not know anyone so I would be very pleased if someone who knows these things could tell me a programme to purchase that would be easy for me to put sound on the films, have some knowledge but being nearly 70 you tend to forget things in past years you just did, thanks for looking
Answer #1
You could use Audacity, it has several options to record from depending on your equipment and hardware capabilities and then Windows Movie Maker to edit. Both programs are free. Here are the links:
http://audacity.sourceforge.net/
http://windows.microsoft.com/en-us/windows-live/movie-maker
Answer #2
My father (also in his 70’s) uses Power Director to put together his videos.
You drop your video into the program, and then can record your audio onto a separate track right in the program.
There are several versions that are basically all the same, with the more expensive ones having more templates / transitions etc.
Free trial available, and you can find it it here at WBB; however, if you do get the version, use PowerDirector 12 (not 13, as there isn’t a good patch out for it).
Cost: From $69 Canadian and up
http://www.cyberlink.com/products/powerdirector-ultimate/features_en_CA.html
@JackT: audacity is good for audio recording, but doesn’t do the video/audio
Answer #3
Adobe Premiere Elements is also very easy to use.