Do not use clumping litter when your kitten is young.
Any clay litter can be dangerous, but clumping litter is particularly dangerous for kittens.
By and large, self-cleaning litter boxes use a combination of clumping cat litter, an electronic sensor and an automated raking system to detect soiled clumps of litter and push them into a waiting receptacle.
Sodium bentonite is an additive in most clay cat litter that is made from Portland cement and used as a clumping agent.
You fill the box with litter, preferably a clumping litter that seems to work best with sifters, and wait until it's time to clean the box.
