Gather all 16 colours of wool.

Craft and place a Flower Pot.

Cook and eat a pork chop.

Throw diamonds at another player.

Kill a skeleton with an arrow from more than 50 meters.

Construct an Enchantment Table.

Acquire diamonds with your iron tools.

Construct a Dispenser.

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

Travel by minecart to a point at least 500m in a single direction from where you started.

Catch and cook a fish!

Turn wheat into bread.