A absolutely wonderful app for smartphones called Legend Online: Dragons, has been set to FREE to download and great for strategy learning. Each level you're led through up to a certain point to teach you how to play.
The app consists of rebuilding a castle that was in ruins. You battle the devil and demons to help to bring back the castle to its former being. There are several different stages. You must level up to be able to build up on the castle and be sure to level up the soldier that you play as. As you level up, you gain more stamina to defeat the devil and the demons that are trying to destroy the entire world, mostly around the castle.
The more you defeat the devil and the demons, the better it will be for leveling up your buildings within the castle walls.
This game is a lot easier than it sounds and can become quite addictive. It's easy enough that children can play and fight to save the castle and mankind in the game. It's a very colorful app with lots of different levels. Leveling up is not hard to do at all!
Enjoy your free game on your Android or Smartphone. You can get it via the Google Play Store.