That is not the question Cindy, the question is were they judged guilty of sin by God. The answer is yes , God judged them as having thoughts that were continually evil so they were destroyed .
Their eternity like ours is 100% in the hands of God.If any went to heaven , it was not because they were innocent (they were already judged guilty) , or under the age of reason .It was because they were saved by the mercy of God (not getting what they deserved) just like us.