Just when you thought things couldn’t get any worse when 75% of the films hitting theaters this year are in 3D or RealD, Robert Rodriguez introduces 4D with his new feature, the Aroma-Scope.

Sure, it’s not the newest idea. From the major plot points in Joe Dante’s Matinee from 1993 to John Waters’ “Odorama” in the film Polyester, the idea has been played with in the past, but never to the level of a summer blockbuster. Deadline explains.

[Rodriguez] used the marketing strategy of billing his fourth installment in the Spy Kids franchise as a “4D” flick by adding scratch-and-sniff scent cards for audiences. It’ll be interesting to see if this add-on “Aroma-Scope” value increases moviegoing beyond just the 3D higher ticket prices when the pic opens Friday. “When it came time to do Spy Kids 4, I couldn’t just go back and do 3D like everybody else is now. I had to bring something extra,” Rodriguez told the the AP.

I am a fan of the Spy Kids franchise, there is no shame in admitting that. Even that crazy CGI orgy of mangled ideas that was Spy Kids 3(D) had a certain amount of enjoyment during its run time. One of the trademark elements of the Spy Kids films, and honestly any Robert Rodriquez film, is the music.

Rodriquez usually plays a very active role in the sound of his films, and the newest adventure of the extended Cortez family is no different. Written with Carl Thiel, the score for the fourth Spy Kids feature retains much of the same sound of the franchise predecessors. The music is a fun mix of sexy spy action, trademark Rodriquez guitars and a bubbly sheen that works perfect for this brand of kid movie.

Evoking many of the same tones as the previous Rodriquez kiddie films, this score generally works a collection of themes and action beats for general children consumption.

There is a lot to like about the music on this album, and sight unseen from the context of the film the music has wonderful pace. I find myself going to listen to one track and looking up a little later three or four tracks down the list. There is an infectious quality to the music in this movie, it has all of the bubble gum charm one comes to expect from one of these films.

I particularly appreciate a strong appreciation for specific themes that this soundtrack seems to have. There are themes for almost everyone in this release, and that is exactly how to appeal to younger kids. Broad strokes that are easily identifiable, yet strong on their own.