Can a four year old sleep in a crib?

Yes, a four-year-old can sleep in a crib if they are comfortable and safe in it. However, many children transition to a toddler bed or regular bed around this age for better space and independence. It's important to ensure that the crib meets safety standards and that the child is not at risk of climbing out or getting stuck. Ultimately, the decision depends on the child's size, development, and the family's preferences.