Start hitting the thrift store and picking up glass containers to hold specimens in. It would be great if they had lids, but you will find a lot that don't. You can use to ones with lids for the liquid stuff. I picked up some of those add water and they grow, brains from Dollar Tree. They looked great in a specimen jar with a little red food coloring in the water. Something that looks cool it gnarled roots driftwood. Pick up a couple fist sized ones, put them in a jar, and people don't recognize what the are. But you are going to need a lot of jars so start looking now.