Grown-ups should always be involved in any activities involving heat, sharp knives and appliances.
Tired of shelling out almost $5 for a bottle of fizzy, tart kombucha? You can make it at home for much less. You’ll need something called a SCOBY. (It stands for Symbiotic Cultures of Bacteria and Yeast.) You can get one by mail here—but be prepared: The jelly-like disc is a bit slimy—which means kids will love it.