Pretend play goes a bit far?

Haley regularly speaks to her toys and stuffed animals as if they're real, which is quite cute. But every once in awhile, she really stretches her imagination. Tonight, I had set a paper grocery bag on the floor for the cat to play in. Haley thought it was a pretty cool toy, too, so she played peekaboo (put the bag on her head, said "Where'd Haley go?" and then would emerge from the bag saying "There you are"), put things in the bag, etc. As she was putting things in the bag, she would say "Here you go," as if they were gifts for the bag itself. Then the bag started to fall over and she got very indignant and told the bag to "Sit up!"