stimming
v.β Β«Other students performed tasks to play with nail polish or perfume, or to spend a few minutes “stimming,” or self-stimulating, with a bucket of colored buttons.Β» ββFrom Closet To Classroom: Schools And The Disabled Part Iii: Severely HandicappedβThe Biggest Challenge” by Christopher Connell, Lee Mitgang AP Oct. 27, 1987. (source: Double-Tongued Dictionary)