Sandy Murry is one of the characters of the A Wrinkle In Time novel.
Sandy and his twin brother Dennys are the middle children in the Murry family, older than Charles Wallace but younger than Meg. They are 10 years old at the time of this book. Sandy is named after his father, Dr. Alex Murry. Although they are certainly intelligent, Sandy and his twin are considered the "normal" children in the family: B students, good at sports, and well able to fit in with their peers. Of the twins, Sandy is generally the leader, and the more pragmatic of the two. He and Dennys first appear in Chapter One