Hot Cross Buns is a set of interactive Excel worksheets. Numbers and/or variables are arranged in a cross, such that the sum in both directions is the same. Students work to find the value of missing sections. As students enter the answer, feedback is immediately provided. If incorrect, students may try again with no penalty. This unique activity leads students to solve equations with sums on both of the equals sign. One potential problem is students must enter the solutions exactly to get feedback of "correct". Otherwise, this activity could easily be used in class to enhance equation understanding and solving equations.