Yes, deep down we all know that animals don't actually express joy the way we do, so just because they look like they're doing a little dance of joy or have a huge, beaming smile, doesn't actually mean they're happy. Even so, it's pretty darn hard not to believe that the critters on this Buzzfeed list aren't in pure ecstasy.

It's also pretty darn hard not to get a giant smile on your own face when you look at these unbelievably smiley critters. In fact, you might want to bookmark this page because it's almost certain to help you cheer up next time you're having a bad day.

Here's a great example of "beating swords into plowshares," or something close to it. Mexico City artist Pedro Reyes built a mechanized orchestra out of weapons! The project is titled Disarm.

The team acquired a variety of rifles, pistols, and shotguns seized from drug cartels by the Mexican army and used them to build the musical devices that are controlled by computers and can be pre-programmed to play music.

See more pictures, and a video of the orchestra in action, at Colossal. Link -via Digg