It's easy to bash out a rhythm on it. The hard part is learning how to get the various kick, snare and click tones, playing them cleanly and consistently and melding them into a convincing groove. Really quite tricky! Apart from the kick and snare sounds, you need the fill-in notes that stand in for the hi-hat, which are ghost notes played gently on the top edge of the drum. The kick is played with the meat of the hand, the snare and taps with the fingers. It's rather like rubbing your stomach, patting your head and doing something improbable with your thumb at the same time.
The wife goes back to work tomorrow so I'll get working on my hand technique.
Then I'll record a bit of cajon for you all to listen to.
