Crystal Growing Kit (Each) Seed crystal colour is random

What you're getting

This Crystal Growing Kit lets your child grow their own crystals from scratch and actually learn how it all works. You get two bags of crystalline powder, one seed crystal, a wooden stick, a jar (12cm), and instructions that won't tie your head in knots.

The whole thing takes about 10-15 days, so it's the kind of project that keeps them interested without demanding your constant attention. Once they're done, the crystals look decent enough to keep on a shelf. Fair warning: the seed crystal colour is random, so you don't get to pick.