This is a fantastic project! Building a sensory chair with your step-son is an incredible way to bond, empower him, and create something that is perfectly tailored to his unique sensory needs. Your tech background is a huge asset here. Let's break down the concept of a "sensory chair" into different modules and ideas, ranging from simple to complex.
The core principle is user control and customization. For someone with AuDHD, the ability to control their sensory environment is paramount. The chair shouldn't just do things; it should be an instrument he can "play" to regulate his nervous system.
Let's ideate based on the different sensory systems the chair can engage.
This is the sense of pressure and body awareness. It's often very calming and organizing for individuals on the autism spectrum.