This set of 105 subtraction flashcards is perfect for students in kindergarten through 8th grade. The cards feature new media materials to make learning fun and engaging. Each card is sealed in its original box for added protection. The brand of these flashcards is Media Materials and they were made in China. They are a great educational tool for children and can be used in the classroom or at home. This set does not include any custom bundles or modifications and is recommended for ages 4-16.