The whole “world” is our six senses.This is where it ALL starts.
When the eye meet an object, the eye consciousness arises.
The union of three: The eye+ the object + the eye consciousness = contact (arises)
(The same is true for all other 5 senses).
Contact gives rise to feeling, perception and mental formations.
In every step there is this “glue” which makes it ”sticky”
Feeling then give rise to craving …to clinging…to becoming…births…(Dependent Arising/Origination)