A few weeks ago, we told you about the Piano Stairs, an experiment conducted by car company Volkswagen to test if human beings would improve their habits if something was more 'fun' - which in this case involved choosing between the stairs and an elevator.

The experiment was so successful that the company decided to launch another one as part of what they dub as their 'fun theory'.

This time, they fitted a normal trash can with a fun sound effect. Every time someone threw something in there, the trash can would let out a fun sound.

As you will will see from the video, the results are astounding - not only are more people throwing their garbage in the trash can, but some are actually looking for trash to dump, just to hear the fun sound! Pretty amazing!

source: funtheory.com