I was watching the latest speed racer trailer on apple.com and I thought to myself, too bad this movie is rated PG-13 because this movie looks perfect for younger boys. It's like hot-wheels on a hollywood budget.
Lo and behold, somewhere along the way, they changed the rating from PG-13 to PG - a smart move, I might add. If you look on the Speed Racer trailer page, the rating still says PG-13. Be careful of movies that have been converted from PG-13 to PG (or from R to PG-13 for that matter); they tend to push the ratings envelope a bit and have odd traces of mature subject matter.