Earth Day Lanterns: A great craft for celebrating Earth Day using recycled/reused materials (especially if you save tissue paper from gifts like I do!)
The lantern instructions at Craft Train by Kate Grono include a recipe for making your own mod-podge to attach the tissue paper to the jar.
In addition to use as lanterns (with battery votive candles), these jars could also be used to hold slips of paper with prayers of thanksgiving for created things written on them, or make two and one could hold the pen and blank slips of paper and the other the prayers.
This project would go well with lessons about Creation, Genesis 1. The Writing Team Creation Bible Background (free and open to all) would be a great start to helping you write a lesson to go with this craft.