She's simply saying I WUUUUUUV YOU!
Look at all the stuff I killed for you.
Look at all the stuff I brought you.
I WUV YOU!

Kuhio used to do the same to my husband. He would think she wanted to play, so he'd pick it up and throw it. She got PISSED. How could he throw away her present? She'd go back and get it and drop in close to him and then lay on it so that he couldn't throw it again.

Silly kitties.