Magic Squares are easy activities for students to do as sponge/warmup or exit activity. These can be projected on a Smart Board or projection device and need not be copied. Each row and column, when added up, will have the same sum. In this particular Magic Square, the "magic number" is 15.
The two provided here are on Editorial terms and characters from the Gary Paulsen book, "Harris and Me." Once you have the formula down, you can create magic squares for any subject/content.