We said we were never going to buy a themed blanket set for our kids. We said we just wouldn't do it! Then we went to the store to buy bedding for Chase and couldn't find anything remotely appropriate for a kid and bought a complete "Cars" themed bed set. Chase's reaction was worth it. We took him to his room to show him the bed and he did a sharp intake of breath and then just started grinning ear-to-ear. He loves going to bed at night because of the cars all over his bed.
Howard and I were both sick last week and decided that we would let Chase watch the movie "Cars" with us since we weren't up to running around. Chase was so excited! It was a real treat because we don't let him watch TV except for NASCAR races. He now knows that his bedding is related to the movie. His favorite part was the tractor tipping that Mater and Lightning McQueen did. He has a toy tractor that he pretends to tip over complete with the sound effects from the movie which is hysterical.
Now, I will say that even though we bought the bedding we aren't going any farther with the theme. Chase loves anything car related which is why the bedding works but we are not going to feed into any "Cars" obsession. A little goes a long way if you know what I mean. :-)