A free app for Android, by Hippo Kids Games.

Hippo Keys: Hidden Objects is a game for kids and toddlers. It is suitable for boys and girls of all ages. It is an exciting mini quest with a lot of objects and tasks. The player needs to find keys and open the doors. The task is never easy, because the treasure is hidden and there are a lot of objects in the house. The player needs to put things in order and find the keys. It is a real mini quest for children. 

Hippo and Ji are going to have lots of interesting tasks. Their favorite doll is hidden, and it is never easy to find the family treasure.