PBS
Pbs Learning Media: Daniel Tiger's Neighborhood: Article: Coping With Frustration
This article from the Fred Rogers' Company discusses the importance of being able to cope with frustration in a healthy manner. This practice will help children develop healthy attitudes.
Other
Lego Foundation: The Role of Play in Children's Development
This article reviews research that has been conducted in relation to the five types of play, namely physical play, play with objects, symbolic/semiotic play, pretend play, and games with rules.