Octa-B Braille learning tool

Design submitted on Pinshape contest : Envision The Future Design Challenge
https://pinshape.com/items/35262-3d-printed-octa-b-bearing

Starting from the idea that alphabet is easier to memorize if student can create and touch characters by himself, i tried to find a way to compose Braille character easily even for visually impaired people with a tactile tool. Since all characters can be created using 2 series of 8 different combinations, i designed 2 octagon parts with all dot combination