Awesome. Please share photos and lesson feedback.
I'll move this idea into our Lesson Forum.
I really do like decoupage projects! Very hands-on, age-adaptable, and lots of room for self-expression. Here's one I posted for a "Lenten Journey" lesson based on a decoupage art project our Writing Team did for Psalm 8 "When I Look to the Heavens" (seen below). The "tips" in those lessons might be helpful to you, especially if you've never glued color tissue before with kids.