A few possibilities for what you might be looking for:
Provocative Nature: They are meant to be hilarious and controversial, often alienating those who find mocking children's media offensive.
Why parents and teachers love them (even the cautious ones):
The Premise: A child wakes up to discover that the number four no longer exists. You can't count to four. No one has four fingers. The day is only three meals long. Why it’s unusual: It is a meta-mathematical horror-comedy. The child has to convince the world that four was real. The climax involves a dance with the ghost of subtraction. Age range: 7–11 (perfect for kids who love math or hate math).