The gold standard for Superman lines is still "You're stronger than you think you are" from All-Star Superman, but I'm definitely proud of it.

I also write the ongoing Scribblenauts series at DC where we're explictly trying to reach younger readers (not sure how old she is). I get to play with the entire DC universe and the second issue is devoted entirely to the Superman family. We call our approach awedorable (awesome+adorable).

I'm so glad to hear that it had an impact. The whole team worked hard to make something special.