Sandplay therapy is a form of psychotherapy where you create scenes in a tray of sand using miniature figures, allowing thoughts and emotions to surface without needing to talk through them directly. Developed by Swiss therapist Dora Kalff in the mid-20th century and rooted in Carl Jung’s psychology, it works on the principle that images, symbols, and play provide direct access to parts of the mind that are difficult to reach through conversation alone. Though originally designed for children, sandplay is now used with adults dealing with trauma, anxiety, depression, and a range of other concerns.
How a Session Works
A sandplay session centers on a specially sized tray filled with sand. The standard tray measures roughly 20 by 29 by 3 inches (or about 50 by 72 by 8 centimeters in the European standard). The interior is painted blue so that when you push sand aside, the exposed surface can represent water, sky, or whatever meaning feels right to you. The tray is small enough to take in with a single glance, which helps contain the scene as a unified image rather than something that sprawls out of view.
Alongside the tray, therapists maintain a large collection of miniature objects. These typically fall into broad categories: animals, human figures, everyday objects, and natural elements like rocks, shells, and plants. Animals often serve as stand-ins for instincts or relationship dynamics. Human figures can represent real people in your life or archetypal roles. Objects and natural elements tend to symbolize emotions, memories, or personal experiences. There’s no instruction manual for what each piece “means.” The meaning comes from you.
During a session, the therapist invites you to arrange the sand and place figures however you’d like. You might sculpt hills, dig rivers, build barriers, or leave the sand completely flat. The therapist generally stays quiet while you work, observing without interpreting or directing. This is intentional. The goal is to create what Kalff called a “free and protected space,” a setting where you feel safe enough to let your inner world take shape without judgment or analysis interrupting the process. The therapist’s quiet, attentive presence is the container that makes that safety possible.
Why Working With Sand Reaches What Talk Therapy Sometimes Can’t
The core idea behind sandplay is that not everything we struggle with lives in the verbal, conscious part of our minds. Trauma, early childhood experiences, and deep emotional patterns often exist below the surface of language. Sandplay shifts the focus away from solely verbal communication or cognitive insight, giving those nonverbal parts of experience a way to be expressed and seen.
This isn’t just a theoretical claim. Research into the neurobiology of sandplay has found that the multi-sensory experience of working with sand, touching it, shaping it, visually composing a scene, activates both cortical and subcortical brain systems. One identified pattern, called the “Sandplay Sensory Feedback Loop,” describes how engaging multiple senses at once can activate bodily sensations, emotions, and creativity simultaneously. That combination opens up new perspectives and problem-solving pathways that aren’t available through talking alone. A study on women with generalized anxiety disorder found that sandplay improved not only clinical anxiety symptoms but also metabolic brain functioning in the limbic system (the brain’s emotional processing center) and the prefrontal cortex (involved in regulation and decision-making).
Who Benefits From Sandplay
Sandplay was first developed for children, and it remains especially well suited to young people who lack the vocabulary or emotional awareness to articulate what they’re feeling. But its applications have expanded significantly. Research reviews have found clinical utility across a wide range of populations and conditions: emotional and behavioral problems, ADHD, anxiety, depression, addictive behaviors, and post-traumatic stress in children and adolescents, along with anxiety, depression, and post-traumatic stress in adults.
The nonverbal nature of sandplay makes it particularly valuable for people who find traditional talk therapy difficult or insufficient. This includes adults with trauma histories, individuals with disabilities such as autism spectrum disorder or traumatic brain injury, people with dementia, and refugees or immigrants navigating the stress and potential traumatization of migration. Group sandplay has shown particular promise for people with social anxiety and difficulty in interpersonal relationships.
Evidence for Trauma Treatment
Sandplay’s most studied application may be trauma. It’s widely used across multiple countries for treating PTSD, including survivors of natural disasters like tsunamis and earthquakes where large numbers of people need support quickly.
In a study published in the Journal of Creativity in Mental Health, five adults with trauma exposure completed seven to nine 50-minute sandplay sessions. Four of the five showed a decrease in trauma symptoms, with two experiencing a large to very large impact and two showing moderate to small improvement. One participant’s symptoms worsened during treatment, highlighting that the approach doesn’t work identically for everyone. Still, four of the five reported feeling safe enough within the sandplay process to explore their trauma, communicate their responses to it, and engage in active therapeutic work. Separate research has found that veterans with military combat trauma also responded positively to sandplay-based interventions.
These are small studies, and sandplay research overall tends toward case studies and small samples rather than large clinical trials. But the consistent pattern across different populations and countries suggests a genuine therapeutic effect, particularly for people whose trauma doesn’t respond well to purely verbal approaches.
Sandplay vs. Sand Tray Therapy
You’ll sometimes see “sandplay therapy” and “sand tray therapy” used interchangeably, but they’re distinct approaches. Both trace back to Margaret Lowenfeld’s “Wonder Box” technique from the 1920s, and both use sand and miniatures. The key difference lies in the therapist’s role. In Kalffian sandplay, the therapist is nondirective: you build your scene freely, and the therapist does not guide, prompt, or interpret during the process. The theoretical framework is Jungian, with attention to symbols, the unconscious, and what Jung called individuation, the process of integrating different parts of your psyche.
Sand tray therapy, by contrast, often involves more therapist direction. A sand tray therapist might ask you to build a specific scene, represent a particular problem, or respond to prompts. It draws from a wider range of theoretical backgrounds, not exclusively Jungian. Both are legitimate therapeutic tools, but if a practitioner specifically identifies as a sandplay therapist, they’re typically working within the Jungian, nondirective tradition.
Training and Certification
Becoming a certified sandplay therapist requires substantial training beyond a standard mental health license. Through Sandplay Therapists of America (which aligns with the International Society for Sandplay Therapy), candidates must complete 120 hours of education and training, 100 hours of their own personal therapy that includes a sandplay process, and 40 hours of case consultation before reaching candidacy. Full certification as a Certified Sandplay Therapist adds another 80 hours of case consultation plus written papers on symbol and case work. A lower-level designation, Registered Sandplay Practitioner, requires fewer hours but still includes personal sandplay experience, 36 training hours, and supervised case consultation.
The emphasis on the therapist’s own sandplay process is unusual among therapy certifications. The idea is that you can’t hold a safe, nonjudgmental space for someone else’s unconscious material unless you’ve spent significant time with your own. If you’re considering sandplay therapy, checking whether a therapist holds STA or ISST certification is a reasonable way to verify their training depth.