The Stanley Parable: Ultra Deluxe helps kids practice and improve the following skills:

Working Memory: Recalling and retaining information in our minds while working. 

In order to experience as many endings of the game as possible, the player needs to have strong working memory skills. There are locations in the game that are only accessible after the player has moved through them on a previous play through. This means that the player needs to remember what was previously inaccessible and weigh this against their current course of action. The player also needs to remember what previous actions they took so as not to repeat the same steps and get the same ending. 

Flexibility: Trying something new. 

There are many different ways to move through The Stanley Parable: Ultra Deluxe and the player needs to use their flexibility skills and be willing to try something new. Trying new things in the game opens up new dialogue from the narrator, new endings, and new areas to explore. Without flexibility, the player may find themselves repeating the same endings over and over again.