The Digital Seed is a microworld for learning about plant growth, life cycles, and the origin of seeds. The Digital Seed is a virtual alter-ego of a real seed, he lives in a cube. To grow up he needs help from outside, the user must take care of the seed: watering the cube, keeping the cube the right temperature, and exposing it to the right amount of light. The physical actions on the cube will affect the inner virtual world where the seed lives and grows. The user must care for the seed throughout its life cycle until the end, with the birth of a new seed.