Dabble is to delve, to dig. Dabbling would infer playing - playing with poisons, as though that was your hobby. To dabble in something, is to play/experiment/try something as a hobby, but not too serious that you can't be interrupted.

Dabble means to undertake an activity superficially or casually. In other words, this activity is not acted on in a serious manner.

Dabble means to be involved in an activity, but in a non-serious/casual way.

Meaning he engages with it.