When your volcano model is ready, lift the cap and watch the pouch drop into the lava. It will foam up slowly, mimicking the slow buildup of earth's gases, until the vinegar fully soaks the tissue ...

Mike Adamick is a stay-at-home dad who writes for the Adventures in Learning science blog at PBS.org, the San Francisco Chronicle, KQED Radio, Disney's parenting website, Babble, and the Daddy ...