What could a gift like this signify?

I'm in a situationship with a girl, for over a month. Last night, we went to event together and afterwards talked in her car for like an hour, literally sitting in the parking lot. Right before I left, she gave me a gift bag with some nice color markers, sticky notes, and dark chocolate.

Now the chocolate, I've told her that dark chocolate is my favorite, and that's probably why she got it for me. The markers, I'm an artist, so that could be why she gave me those. However, though I would've appreciated even an ordinary rock from her as a gift, I'm confused a little by the sticky notes. Nothing special about them, just regular ole sticky notes.

Could there be some kind of meaning behind sticky notes? I tried asking her about it but I didn't really get a straight answer.
What could a gift like this signify?
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