Build a tower of Scaffolding that reaches the maximum build height.

Power a Furnace with Lava.

Find an underwater ruin.

Befriend five wolves.

Catch and cook a fish!

Bake a cake using wheat, sugar, milk and eggs!

Use a saddle to ride a pig, then have the pig get hurt from fall damage while riding it.

Create an Iron Golem.

Play a music disc in a Jukebox.

Use Shears to obtain wool from a sheep.

Breed two cows with wheat.

Construct a Nether Portal.

Gain the trust of an Ocelot.