I cannot remember if I shared this or not, but this is a great experiment to try with your kiddos. I would say the age should determine how in depth you get with the science of it. Even if you don't go too in depth with it, even little ones might enjoy watching the corn dance with "magic".
I found this on Pinterest. You can find the original posting here. onetimethrough.com/ does such a great job describing this experiment that I will just tell you to go read their directions.
And have fun with this! It's a great way to entertain your kiddo while resting and conserving your energy!!