A pacifier.
All parents are supposed to think the same things about their kids. She's yours and you love her to pieces so why wouldn't you think whe was the most brilliant creature to grace the planet?!
She sounds like she does a lot of the weird, fascinating things that my kids did at that age. She sounds pretty normal to me. I guess that might sound like bad news if you are expecting her to win a nobel prize but it was meant as a compliment.
My youngest has 3 pacifiers (dummys) and he knows where all of them are. People keep advising me to get rid of them as he loses them (as if I don't know how to deal with this subject after already going through it with my older son) but he never loses them.
It is always a treat to hear people enjoying their little ones so much.
Best wishes.