Construct a Dispenser.

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

Play a music disc in a Jukebox.

Kill a creeper with arrows.

Catch and cook a fish!

Cook and eat a pork chop.

Smelt an iron ingot.

Use planks and sticks to make a hoe.

Attack and destroy a monster.

Construct a furnace out of eight cobblestone blocks.

Craft a workbench with four blocks of wooden planks.

Open your inventory.