To litter train a kitten, you will need a litter box filled with unscented, clumping litter. Place the litter box in a quiet and easily accessible location for the kitten. Encourage the kitten to use the litter box by placing them in it after meals or when they wake up. Praise the kitten when they use the litter box correctly and clean up any accidents promptly. Be consistent with the training and ensure the litter box is kept clean to encourage proper use.