Kitties- is a plural to kitty or Kittens.
Kittens Are baby cats.When the come out of the cats belly their eyes are closed.In about a week they open their eyes and start learning from their mother.
Some thing they learn are
.using the litter box
. Getting used to a litter
If kittens have brothers or/and sisters they play with them. About 3 weeks pass and the mother can let the kittens go.