The T-Rex had a third leg instead of a tail. Also, at first we thought it was making a broken noise, but then it started making a horrible clicking noise non-stop until we turned it off. The T-Rex is my son's favorite and that's why I bought the set of 4 and not individually as it was the only one that wasn't sold separately. I would go back, but we had already put the scenes together before we realized it. Very disappointed.