I found these clear ornaments in a dollar store a few months ago, and I knew I had to do something with them. My own tree is artificial and very much lacking in literal touches of nature. I spent Sunday morning gathering leaves and twigs from my backyard to fill the ornaments with. It was actually a very nice way to spend a Sunday morning.
I originally filled both ornaments with leaves and twigs, but as I was hanging them on the tree, I saw a dish of dried rose petals on my windowsill, and I immediately switched out the contents of one of the ornaments. They don't match, but they're equally charming.
Is this something you would try?