Schrödinger's Caterpillar deals with themes appropriate to an adult (though immature) audience.

So teenagers will find it hilarious, but won't let on they've had a look. Unless they're students, who will tell all their mates but still not let on to you. But perhaps you are a student. In which case you're unlikely to have teenage children. Unless you're a test tube student who's been kept in the fridge for eighteen years so you can study science in the future and invent a time machine and go back and rescue the test tube from an earthquake and father (or mother) the...

Sorry, is this still the one about the caterpillar?