Foray into Children's Books

I may take a crack at writing children’s books. My brother told me that the last piece I wrote was “too dark” for kids. Yet, he reads them Grimm’s Fairy Tales, stories of monsters and evil magic. So, I’ll give it another shot. Let me know which, for the parents out there, is a more appealing title/subject matter:

“Every Locked Cabinet Has a Key”
“Sometimes ‘No’ Means ‘Later’”
“Smoking Made Johnny Cool”
“The Brother or Sister You Almost Had”
“Don’t Play with Uncle Chester”
…and, my personal favorite,
“Booze is Where Babies Come From”