1.Naming a sheep jeb_ will turn it rainbow colors
2. Parrots will dance to music if they are tamed.
3.There is a hidden room underneath the lava in strongholds.
4.There is a chance of a chest with arrows spawning in one of the obsidian pillars in the End.
Big shoutout to TheDerpyWhale and iDeactivateMC for teaching me these.