Traditional Cajon
The original version is a standard version with out the addition of and snare type effects.

Snare Cajon
My Cajon is a snare type. Inside the drum is a row of snare springs. These press against the front of the drum to give the drum a slight snare sound when played. There are a few other variations used to add a snare effect. Flamenco Cajon’s use nylon guitar strings and others use bells or rattles.

Hybrid Cajon
There are also some desigin variations out there. There is a lap Cajon which is a smaller laptop version. I have also seen versions with a sloped front surface and even Cajon Congas. Different materials have also been experimented with. Meinl offer a fiberglass playing surface and there are picture on the web of an all acrylic version.