This is a set of two Nintendo DS games: Eiken DS & Suuken DS. Individual sales and price reductions are not possible. ☆ Eiken DS - Based on the Obunsha Eiken series ☆ Suuken DS - Certified by the Japan Mathematics Certification Institute - Can Adults Solve It!? Children's Arithmetic Operation has been confirmed on two 3DS consoles. Please refrain from purchasing if you are overly concerned about condition. The items will be packaged in bubble wrap after being made waterproof, and then shipped.