Here's a demonstration I ran across and saved for later myself!
It's posted at Children's Ministry Magazine.
"Born of Water and the Spirit".
Jan's Post was edited by Neil MacQueen, 2012.
I found the idea Jan referenced in a different section of CM where you don't have to log in to see it, and I've corrected Jan's link above. CM's idea is not really a lesson, but a object demonstration. When I first read it, I thought it was weak, but bookmarked it as "interesting" like Jan did.
"Kids first taste plain soda water and later add a white grape juice and create a sweet bubbly drink".
It was an interesting demonstration in search of a better connection to the story. Injecting C02 into water to make sodapop is an interesting idea about mixing water and "spirit" (spirit = breath = air). You could do this with a seltzer maker (if you have one), or make your own soda.
To make "natural" homemade sodapop, look at the simple experiment at Science Kids: http://www.sciencekids.co.nz/e...iments/lemonade.html You use lemon juice (an acid) to unlock the carbon dioxide in baking soda to make homemade fizzy lemonade. It's a chemical reaction.
You should probably add to this an experiment that shows the gas (spirit) which though invisible -is able to expand a balloon. To do this simply place some warm water, baking soda and lemon juice in a soda bottle, cap off with a balloon, and shake. The carbon dioxide with expand the balloon proving it is there.
The challenge here is describing the ingredients properly to get the theology right. "God's invisible spirit is often seen in the people it moves." "Our baptism (water) prepares us to receive God's Spirit (CO2) which unlocks our potential to be faithful followers. "For I can do everything through Christ, who gives me strength." (Phil 4:13)
btw...baking soda in a bread recipe releases C02 the same way to make dough rise when a catalyst is added (typically milk).