There are a lot of recipes on the internet for how to make Mod Podge - here are all of the good reasons NOT to do it yourself.
Mod Podge Diary of a Mad Crafter
Decoupaging with Lace - Urban Comfort
DIY: Gold Glitter Bowl - DIY Bride
What is Mod Podge? Which Mod Podge Do You Use For Your Project
Painted Rocks: Rock Painting Ideas for Kids
Mod Podge Rocks Book Review and Giveaway! - No. 2 Pencil
Controlling My Chaos: Modge Podge Scandal
Rohnert Park group uses rock art to inspire
Why You Shouldn't Make Mod Podge - Mod Podge Rocks