Sea Urchins are particularly suitable for animal development observations and so are introduced in school textbooks. The process from fertilization to the body emerging from the egg can be clearly observed over a relatively short period of time even with a regular microscope, and the larva can be raised to an adult state within a small container. We have developed a new way to provide samples, which solves the problems of obtaining samples and of breeding facilities that face schools in implementation. This article introduces a movement to spread ocean education through recreating the living environments of marine creatures in the classroom.