Hi Twisty Puzzles fans, Bubble Pent is a pentagonal variation to Mosaic Block and Bubble Block. It is a boublesized corner-turning pillowed pentagon prism. As a result of the pillowing, the puzzle never exposes any ridges mid-turn. This makes it a child-safe puzzle . Watch the YouTube video. Buy the puzzle at my Shapeways Shop. Read more at the Twisty Puzzles Forum. Check out the photos below. Enjoy! Oskar