I think it is perfectly normal or if it is not then my daughter is abnormal! She pretty much went through her whole 3rd year with her imaginary dog, Scooby Doo plus the rest of the gang....Freddie, Daphne, Velma, and Shaggy. Seriously, they were always in the car with us, sitting in the shopping cart with Emmi, etc. She was/is obsessed with Scooby Doo. I play into it usually but it can get annoying at times especially when I have to buckle them all into seat belts.
