In Number Puzzles, one set of cards shows 10 simple addition problems and their answers, and the other set shows 10 simple subtraction problems and their answers. The instructions provide ideas for games to find the answer, or find the question to make the answers. Also included are challenges for children to create their own adding and subtracting questions, plus further problems, including the concept of what makes 10.Supporting the PBS KIDS mission, these boxes of game cards are designed to support children's learning development through the early years. The guiding early learning developmental milestones of school readiness inform the content, supporting parents as they get a child ready for school.Each box includes 40 photographic cards and instructions to play a range of two-player games with ideas of games that a child can play to learn key skills. The colorful photographic cards will inspire and develop a confident, curious, and capable child. Parents will love playing these games with their kids.