How old does a relative have to be in CO to watch a baby sister?

In Colorado, there is no specific legal age at which a relative can babysit a younger sibling; however, it is generally recommended that a caregiver be at least 12 years old to provide care for younger children. Parents should consider the maturity level and responsibility of the relative, as well as the needs of the baby. Ultimately, the decision should reflect the family’s comfort and the individual’s capability to care for the child safely.