This is a science experiment kit from EK JAPAN. It appears to be an item from an old package and has been stored for a long time. This experiment kit allows you to learn about the mechanisms of water and air using a pump. The transparent parts make it easy to visually understand the internal structure. 【Condition】 ・The box has scratches, damage, and signs of aging due to long-term storage. ・Detailed operational checks of the contents have not been performed. ・Sold as is. Recommended for science projects, science education materials, as well as for science material collections and retro educational materials. Please purchase only if you understand the condition. #EK JAPAN #ScienceExperiment #ExperimentKit #ScienceProject #Pump #EducationalToy #ShowaRetro Thank you for viewing.