All cards are present. I opened the box once to check the contents and took the cards out. [Become good at math while playing!] "Tsurukame Sennin," a crane-and-turtle calculation card game that children and adults can enjoy together! For elementary school students and junior high school entrance exam preparation. 2-5 players. A card game that trains logical thinking while having fun, gamifying the "crane-and-turtle calculation" method of inferring quantities from the number of animal legs. "Tsurukame Sennin" is a card game themed around "crane-and-turtle calculation," where you infer quantities from the total number of crane and turtle legs. By repeatedly enjoying the process of deriving answers equationally while imagining the number of animals, you can develop logical thinking skills and a sense of quantity. It can be enjoyed without difficulty from lower elementary school grades, and you can nurture "thinking skills" with parents and friends.