OK you guys, I think I've fallen in love with another kids activity. These crystal stars are awesome! Any activity where I get to make something beautiful from bright rainbow colours, and I'm totally on board!
How to make crystal egg geodes (or diamonds in a lid) - Magical Daydream: grow your own crystal egg geode in an eggshell with alum, fun DIY or science project. Including a free printable checklist in blogpost
How to grow your own crystal necklace DIY with alum salt. Make crystals at home. This also works as a great science project for children or a cute original gift for a friend. Click through for the full tutorial / DIY including a printable step-by-step checklist.