Decoupage jar lids with paper napkins and mod podge.
Lantern jars made w/colored tissue paper~
It's super easy to make faux stained glass using mason jars with this tutorial at Mom Spark. I good project for both kids and adults alike!
Colorful glass jar lanterns [Henry Happened] - love the candle glow, but I did this with a vase that sits in my kitchen window - very cute!