Destroy a Ghast with a fireball.

Cure a zombie villager.

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

Build some bookshelves to improve your enchantment table.

Deal nine hearts of damage in a single hit.

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

Mine 1,728 Cobblestone and place it in a chest.

Catch and cook a fish!

Kill a creeper with arrows.

Use planks and sticks to make a hoe.

Create an Iron Golem.

Play 100 matches in a party

Get 20 Ringouts with a Projectile