This colourful, lightweight, vinyl-covered red octagon, vibrating cushion offers a gentle sensation when squeezed or sat on. Relaxing, calming and soothing for the body. Measures 25.5cm x 25.5cm x 7.5cmH. The vibration ceases when not in use.. no on/off switch. The Senseez sensory cushions make ideal special needs cushions, especially for children with autism, ADHD or sensory processing disorder. The vibrating cushions can calm children who need more sensory feedback or help train hypersensitive children to tolerate more sensations.