Well, research is minimal on the mythological implications of acorns. I'll share what I've learned, but I think I'm going to need to draw from my personal creativity to flesh out this symbol. I'll explore that after I report the research results.
1. Biological facts - Acorns are the seeds of Oak Trees.
[Check! My inner science teacher is coming out. I couldn't resist the opportunity to make a diagram. If anyone is interested in it, you are welcome to copy and use it.]