Question for folks with #autistic kids, specifically ones who are extra stiff (instead of hypermobile/hyperflexible). I'm getting my 9-year to be a bit more physically active, and am wondering if anyone has any suggestions for flexibility/mobility exercises that have helped and also haven't proven very frustrating.

(Bodyweight squats are tricky, because it's hard for him to contort properly, which upsets him)

Thanks!