Popcorn rock is a naturally occurring mineral found in the Great Basin of the Western U.S. Place your rock in a glass bowl, add white distilled vinegar, and watch your rock crystals grow! Growing time is 1-3 weeks. Great gift for the science enthusiast!
- Just add vingeger, and watch it grow!
- Great gift for the scientist in your family
|Included||One (1) popcorn rock, instructions