I purchased a used book recently, "Tiny World Terrariums" by Michelle Inciarrano and Katy Maslow. I paid $6 for this book, which was a steal because I just love this book! (And no! I am not affiliated with the book in any way.)
It gave me a lot of cool ideas using closed and open terrariums and HO Railroad Train people 1:87". I love water scenes, I tried my hand at an open mini garden with a waterfall that I made out of fine blue glitter and hot glue and then added some acrylic paint. I also added 2 HO swimmers in the hot glue before it cooled and hardened.
I plan to make more. I bought the heart-shaped glass container from the Dollar Tree store. And the live moss and the raw cork pieces I had already. What do you think?
(BTW - The people may look like they are skinny-dipping, but they are actually wearing bathing suits. The man is wearing a white speedo and the woman has on a one piece gold-colored bathing suit.)