I've been making shadow box projects lately. The whole process is really fun, especially if you enjoy paper cuts, painting, getting messy, and crafting to your heart's delight.
it's also a great way to use all your scrap materials. If you're into paper cutting, or have some cardboard around the house, or what have you. I admittedly toss out a lot of paper with failed artwork attempts, so it's a nice alternative instead of wasting.
Jellies were my first attempt.
I used;
cardboard, paper, acrylics, oil paint, and bristol paper.