The hook (no pun intended) was as much due to the colors as to the way the hooks bounced along the wall in a way that made them seem to be actually laughing.
We went on a search for letter hooks and concluded that the Phillips family must have painted their hooks purple, as none of the sources we found carry them in anythng other than a shabby chic white finish. No matter: choosing your own color and painting them yourself is not a huge project, unless you're spelling out the whole alphabet.
You could do lots of things with these generously-sized hooks besides laugh. Initial hooks would be a great way to keep everyone's stuff straight in your entryway.