Ni no Kuni: Wrath of the White Witch  helps kids practice and improve the following skills:

Flexibility: Adapting and adjusting to changing conditions and expectations. 

As Oliver needs to battle monsters with different abilities, he needs to adapt to each situation differently. The player controlling Oliver needs to use their flexibility skills to determine whether he should attack, use a spell, defend, or let their familiar take part in the battle. Players who struggle with flexibility may find that they lose HP and MP faster, lose more fights, and have to start over at certain times. The earlier battles allow for the player to practice with the battle system and allows them to become accustomed to how to move and make decisions in battle. This way, by the first major fight, the player is at least familiar with their choices and the best times to use certain attacks/spells. 

Planning: Developing a systematic approach for setting and achieving goals.

Oliver has a certain amount of Hit Points and Magic Points that he can use in battle. The only way to refresh these is to touch a save point, take a rest, or consume certain items. Otherwise, the player must plan carefully so as not to drain him of all of his magic points when it is not necessary. This way, when a larger fight comes up, he has the spells he needs to defeat them. Also, Oliver’s familiars and him share the same Hit Point pool, meaning that the player needs to switch back and forth between the two so as not to overwhelm the familiar and drain him of his stamina. 

There are also multiple quests in this game where the player needs to complete a task for a character. These require planning skills as well, as Oliver needs to figure out what steps to take to help out those around him and in what order.