All elder siblings are excited about having a younger brother or sister. But keep in mind to prepare them enough so that there's no insecurity in them when a newborn arrives in the family.
Nightmares/unpleasant (bad) dreams are common among preschoolers as this is the age when they start understanding about normal fears and their imagination is highly active.
Sleep walking is common in kids; Most kids outgrow it by they reach their teens.
It becomes a little awkward to explain such things to your child.
Knowing the interest of your child will help you guide your child better.
Back answering is not just a misbehaviour of your child. There might be underlying reasons for that.
Dress your baby in a way that (s)he remains cheery all the time.
Swaddling gives a very cosy feeling to a newborn baby. The baby feels as if it is still in the mother's womb.
A baby carrier is a soft padded carrier that you wear on your front to carry your baby comfortably.