Construct a Dispenser.

Construct a better pickaxe.

Open your inventory.

Smelt wood trunks using charcoal to make more charcoal.

Use a Dried Kelp block as fuel in a furnace.

Catch and cook a fish!

Play a music disc in a Jukebox.

Cook and eat a pork chop.

Kill the Enderdragon.

Stay underwater for 2 minutes.

Free fall from the top of the world (build limit) to the bottom of the world and survive

Find an underwater ruin.

Visit all Nether biomes [Bedrock Only]