A "10-year-old" refers to a child who is ten years old, typically in the fourth or fifth grade of school. At this age, children are developing their social skills, becoming more independent, and exploring their interests. They often enjoy playing games, participating in sports, and engaging in creative activities like drawing or music. Ten-year-olds are also beginning to understand more complex concepts in subjects like math and science. They can read and write with greater fluency and may start to form their own opinions about the world around them. This age is a crucial time for emotional and cognitive development.