About Us

Our story is the same as yours…we have children who we want to thrive, grow, and discover their God-given abilities.  We believe that each child learns in unique ways and that every child should have the opportunity to explore their abilities in an open and encouraging community. 


We want to provide that same opportunity to every child who walks through our doors. We know the world is a scary place, and it can be easy to feel inadequate as a parent when your child isn’t thriving under “normal” conditions.  That is why we created Sensory Rock.  We want YOU (the parent) to have an encouraging, supportive community where you can relax, and know that you aren’t alone; and we want YOUR CHILD to thrive, grow, adapt, learn, play, imagine, and have fun as THEY define it.

Sensory Rock is a development center for the WHOLE child. Our play, workshops, therapy, classes, camps, and parent seminars are all in our colorful play gym. We "Play With a Purpose!" and we invite new possibilities for you and your child.

Sheri Tos and Juli Polder
Owners of Sensory Rock

Rock Climbing Wall
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Sensory Play
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Rocketeer Fun
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Ball Pit
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Zip Line Fun!
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Sheri Tos

Sheri was inspired to create Sensory Rock through a journey that started with her volunteer work as a co-coordinator for middle school ministries.  She realized the first day of the program being met with children that had special needs there was a lack of understanding within herself and others how to properly help encompass all children justly.  As she turned to her faith she uncovered the deep need of helping a community through experiences that an inclusive play-gym along with therapy could provide.  Through the love and support of her husband, Jeff, a local farmer, they purchased the old FAST Credit Union building in downtown Hanford, CA, and began a labor of love for ALL children to be nourished, accepted, and inspired.  With the expertise of Troy Pfefferle of Fun Factory Sensory Gyms, the FAST building was transformed into a colorful play-gym/therapy and is becoming a childhood development center.  As a mother of pre-mature identical twins the journey also uncovered awareness of how sensory and neurological development can enhance any child including her own.

Sheri graduated with Honors with a Bachelor's of Science in Business Management from Fresno Pacific University and has served 20+ years in youth volunteer leadership and programs. She has a compassionate heart for children in need. R.O.C.K. stands for "Reaching Out Connecting Kids," and that is the aim of Sensory Rock: to connect children with the resources they need to achieve and succeed.  

Sheri and her husband Jeff have twin boys: Austin and Aiden. 

Juli Polder

Juli has had a passion for working with kids from a very young age between caring for younger siblings, babysitting, and volunteering in daycares. She earned her Bachelor’s of Science in occupational therapy from Creighton University and her Post-Professional Master’s of Arts in occupational therapy with a specialty certificate in Pediatrics from Texas Women’s University.  Juli's experience and training includes:

  • Certification in the Sensory Integration and Praxis Test (SIPT- 2005),

  • Certified Lactation Consultant (CLC) training (2014),

  • Baby Myo / Tethered Oral Tissues,

  • Handwriting Without Tears,

  • The PLAY Project (DIR/Floortime) 

  • And many others.


Juli has spent 10+ years practicing occupational therapy in a variety of settings, including skilled nursing facilities, hospitals (both acute care and inpatient rehab), sensory-based clinics, school-based settings, home based pediatric services, and early intervention.


Juli has a passion for helping families and children achieve their highest potential. She believes that by identifying and addressing concerns early, many challenges that often show up for older children can be mitigated or avoided completely. As a mother of 3, Juli has a keen understanding of the challenges and joys that accompany parenthood. Juli strives to support each and every family with compassion and a proactive approach.

Juli Polder