Rockin’ Cave Experiment to Celebrate the King
Creativity, nature, Nature Getting Crafty Add comments ...Happy Friday everybody! I’m ready for the weekend, how about you?
I was recently minding my own business, researching caves on the internet (as one does), when I came across this awesome experiment. Not only will it make you smarter, but it will impress the you-know-what out of your kids/friends/dog.
Have you ever seen the deep, dark caves of the world? Have you noticed the drippy rock structures that hang from the top and pierce up from the bottom. You may know that those are called stalactites and stalagmites. (Stalactites hang tight to the ceiling, while stalagmites are mighty, because… um.. they’re on the floor. You get it.)
- water
- string
- epsom salts
- 2 jars
- pilfered rocks from neighbor’s garden outside
- small saucer
Fill the jars with water and add salt until no more will dissolve. Dip the string in the water to wet it completely, and tie a rock to each end. Drop your rocks into each jar, leaving a bit of string hanging in between over the saucer.
Presto – you’ve got yourself the beginnings of a cave! Put your contraption somewhere the cat won’t find it (it’s her saucer, I presume) and check back each day to see if stalactites and stalagmites have formed.
Listening to this will definitely speed up the process. (Come on, today would have been Elvis’ 75th, and the song has ‘rock’ in the title. It’s like it was meant to be.)
I hope someone got my title pun…

January 8th, 2010 at 4:28 pm
Oh, I’m going to impress my kids with this, tomorrow!
January 8th, 2010 at 4:51 pm
Awesome! I remember doing this as a kid. My son did almost the same thing with a super-saturated sugar solution. Hung a string in it and as the water evaporated he was left with a string of sugar rocks.
January 9th, 2010 at 2:01 pm
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January 13th, 2010 at 3:35 pm
What a great idea. I spent several summers as a cave guide and caving specialist (yeah, those are real jobs). Nothing like crawling around in the bowels of the earth… This experiment looks so fun!
April 23rd, 2010 at 2:45 am
What a great idea. I spent several summers as a cave guide and caving specialist (yeah, those are real jobs). Nothing like crawling around in the bowels of the earth… This experiment looks so fun!