Now, I'm not sure how many people here actually play LittleBigPlanet, but for those who do, you can reccomend cool levels on this thread!
Rules:
-No bomb/shark survivals, they're too frequent, and don't vary
-No costume tutorials, they're not really proper "levels" as such
I'll suggest Lifespan by Kaiju_kid, it tells the story of sackboy's life from birth to death, and quite touching.