HelpMinecraft (Creative) Secret Recipes

Hi!
I'm playing minecraft about 1.5 years. I know that in Creative mode there are some secret recipes (like the firework). I have tried to find more, but I couldn't. Can you please write me some, if you know? Thanks in advance!

Here's fireworks, but there are no secret creative-only recipes. Crafting does not check for GM so what is possible in creative is possible in survival.