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

Catch and cook a fish!

Make the Meadows come alive with the sound of music from a jukebox

Smelt an iron ingot.

Use planks and sticks to make a hoe.

Construct a better pickaxe.

Kill a creeper with arrows.

Discover 17 of 40 biomes.

Throw diamonds at another player.

Acquire diamonds with your iron tools.

Kill the Enderdragon.

Construct a Nether Portal.