Learn Logic Differences with Patterns in the Game Whack a Difference A great way to teach patterns to kindergarteners and preschools is through online logic games. Kid’s logic games, like Whack a Difference, is a fun drillable way to build your child’s comprehension of patterns and their differences. Whack a Difference is a great logic game because it allows you to drill the concepts of differences without a lot of printable worksheets. Using online logic games is a fun way to practice patterns.