My son who has ADHD and would move around a lot while sitting, used this hokki stool, also known as a "wobble stool", in class. It was recommended by his physio and occupational therapists. The hokki stool helped him to stay focused in class. No more leaning back in a regular chair and crashing backwards. No more bugging classmates with excessive movement. His classmates also loved sitting on it! Teachers and parents: I have two brand new 18" hokki stools, both still in original box. Save the tax and shipping fees. Get it right away - no 6 week delivery wait. Easy pick up in Victoria. $160 each or best offer. Take one or both. Sitting on the Hokki reduces strain on the musculo-skeletal system, promotes motor development, keeps attention focussed. Anyone who likes to move around while sitting and is looking for a lightweight, space-saving seat that makes this possible will find just what they want with the Hokki Stool. An ergo-dynamic stool designed to improve the gross motor and musculo-skeletal development of growing children. Many adults also find it a comfortable stool for work. This design absorbs and encourages movement while at the same time improving the attention span of the children. The ergo-dynamic German designed Hokki Stool is super tough, lightweight and highly portable. The benefit of ergo-dynamic design for children is proven: The inner organs of the body are opened up not scrunched and restricted. The muscles supporting the lumbar spine are passively exercised and strengthened. More oxygen flows through the body and the brain. The muscles of the abdominal core are passively tightened and relaxed as the child moves on the stool. 100% recyclable UV stable materials give the Hokki Stool an incredible lifespan. The fluted top is designed for portability and features a nonslip seat pad. GECA and VOC Emissions Certified ISO 5970 / EN 1729