If you are bored with the lifeless cubic universe, then you should definitely download Entity Savanna Update Addon for Minecraft PE on Android. The build aims to bring more realism to Savannas. Since in the real Savanna you are unlikely to be alive for at least 1 hour, the author decided to make similar survival in the game as well, adding 6 new mobs at once.
Ostriches
Passive
Can be ridden
Healable with Seeds
Gazelles
Passive
Elephants
Can ride
Can be treated with Watermelons, Pumpkins and Apples
Lions
2 types: females and males
Aggressive after maturity
Children can be tamed with Cooked Meat and treated with Raw Meat.