A mop is a cleaning tool typically constructed of absorbent materials at the end of a long pole. The absorbent materials are soaked in water or some combination of water and cleaning fluid and then dragged over dirty floors to clean up any dust, dirt, or debris.
First and foremost is your child's age and developmental stage. The older a child is, the longer he'll be able to play alone. For example, at 6 months, a child may be content by himself for 5 minutes; at 12 months, for 15 minutes; at 18 months, about 15 to 20 minutes; and at 2 years, for about half an hour.
The National SAFE KIDS Campaign recommends that children not be left alone before the age of 12. Many other children will not be ready until later than that. Also, experts caution that older siblings are generally not ready for the responsibility of supervising younger children until the age of 15 or older.