'God doesn't exist'

This is what my 6 year old daughter said at lunch after church last Sunday. I suppose she is is searching for certainty as well as challenging important issues in her own way. My answer to her was - "how do you know?". She thought a moment and said "because when I asked him to answer my prayers it didn't happen.". "He has a plan and his reasons for not granting all our wishes" I replied.