I think my car's horn is on its last legs. It beeps at about half strength.

How hard is it to change the horns on our cars and can one be bought that doesn't sound like a toy car?

 

You might want to check your horn relay.

 

Wow, that's a great picture.

If it is infact the horn relay, is it just a fuse-like plug that I could pull out and replace by getting a part at a local parts store? Also, when I remove the knee panel, it will look just like that, right, nothing will fall out?

 

Nothing is going to attack you when you remove the panel. The relay simply unplugs.