This chapter focuses on using humanistic sandtray as a structured play therapy intervention with clients aged 9 years and older. Humanistic sandtray therapy is a type of play therapy that can be used with clients of many ages, from preadolescents to older adults. This approach to sandtray emphasizes the primacy of the therapeutic relationship and views the relationship as the curative factor in therapy. In sandtray, therapists and clients benefit from the symbolic nature of the experience because it increases safety and provides clients with a metaphorical and indirect mode of expression. The chapter illustrates the case example to help clients go deeper into their inner experiencing and awareness so that they might move in the direction of becoming a more fully functioning person. Fully functioning people are moving in the direction of increasingly trusting their inner experiencing and becoming open to a wide range of emotions.