Joining a team sport can be an exciting experience for a homeschool student, who may not have many opportunities to socialize with other children. Not only will team sports help them stay physically active, it will help make friendships and learn invaluable lessons that will help them in life. Depending on the local rules and regulations, 3rd graders can join team sports such as soccer, basketball, softball, and flag football. They can also participate in recreational activities such as martial arts, bowling, swimming, and more.