Getting old involves the loss of many things. Hair, joy and your mind are among the most unbearable yet, quite often, "being able to jump into a ball pit" gets all-too-easily forgotten about.
When the members of Physalia Studio were asked to design something under the banner of 'happy', they remembered this fact and concocted a rather magnificent idea.
Using those eternally satisfying plastic balls and a scrapyard-dwelling magnet machine, they created an electromagnetic field that caused an awesome ripple of colourful activity.
The project was for the F5 Re: Play Fest in NYC (you know the one, right?) but the video footage has managed to cause general happiness all-round.
If this doesn't cause a smile then we're giving up on you.
Main image: Rex