I want to build a small web toy for my son that explains why it gets dark at night and light during the day. He cannot read yet, so the first version has to teach through motion, light, repetition, and maybe voice instead of written instructions.
The first constraint is simple: explain day and night before explaining astronomy. If he can move the Earth, see one side facing the sun, and hear a short phrase like “this side is daytime,” the tool is already doing something useful.
The smallest useful version
- Show the sun, Earth, and a clear pool of light.
- Let him drag or spin the Earth.
- Keep the night side visibly dark without making it scary.
- Use short spoken phrases instead of relying on labels.
- Save the moon and tides for a later chapter.
Why this belongs here
This is a Kin idea with Build underneath it. The reason to make it is personal: I want to explain the world to my son while he is still close enough to wonder at it. The way to make it is technical: interaction design, simulation, accessibility, and careful restraint.
The project should not become a general education product too quickly. The sharper promise is smaller and better: a child who cannot read yet gets to understand daylight through motion and sound.