Why not? It is educational and it tastes good, too. [Science with Screens] has a different kind of crystal in mind: copper crystals. You can see the result in the video below. To grow pure metal ...

The artist has allowed crystalline copper sulfate to grow on the walls, the ceilings and on the remaining objects — the bath and a few pendulous light fittings — in this small two room flat.

There are a number of ways that you could make copper sulfate crystals in Chemistry. This is an outline of the required steps to undertake one of these methods. Hydrated copper sulfate crystals ...