Sibling rivalry refers to the natural jealousy and resentment children feel towards a new child in the family. It is common for toddlers to dislike the changes that come with a new baby, such as less parental attention and disruption of their daily routine. The stress is usually greater for firstborn children, who may feel the new baby is responsible for the changes. To help manage sibling rivalry, parents should prepare toddlers for the new baby's arrival, explain the baby's limitations, involve the toddler in baby care activities, and point out the benefits of being an older sibling.