Twiddle is a 2-foot long chain of interlocking plastic links. Twist it, crush it, or take it apart to construct geometric shapes. Dozens of interchangeable links snap into place with a satisfying click, but move silently when twisted or bent. The Twiddle doubles as both an auditory stim toy and a silent fidget depending on how you use it.
Light green Twiddle (3rd photo) glows in the dark!