Construct one type of each tool (one pickaxe, one spade, one axe and one hoe).

Construct a better pickaxe.

Use planks and sticks to make a sword.

Brew a potion.

Craft and place a Flower Pot.

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

Catch and cook a fish!

Craft and place a sign.

Cure a zombie villager.

Use Shears to obtain wool from a sheep.

Acquire 30 Emeralds by trading with villagers or mining.

Play a music disc in a Jukebox.