I like your idea and initiative. But as first I have to thank you for teaching me what juxtaposition actually is. Especially when it comes to photos, I always liked the most that kind of photography, but I never new there is a name for it.
Now, you made me dig through my recent photos to eventually find one that might fit in that juxtaposition category. You will tell me did I succeeded!?! Here is the story...
I planted my basil from the seeds. It took ages while it finally showed its "head" out of the soil. It grows slowly or at least at that stage. I don't know, this is my first attempt. However, its leaves were so small (the photo is taken about month ago) that I couldn't describe it to my kids and friends good enough but by taking the following photo.
So, if I understood the term juxtaposition well, I would say I have two types of juxtaposition on it. First, nature vs pen (office supply) and that big pepper's leaf (that jumped into the scene unintentionally) vs small basil bush with its tiny leaves.
Yes you understood it weel!