Are you looking for a different type of optical puzzle to challenge you? Something that will perplex even you, the perceptive puzzler, even though you think you have seen and solved every mind-boggler there is? Look no further than this collection of eye-popping, brain-twisting, colourful 3-D puzzles. The extra dimension makes it harder to pair off shapes that are equal in length (but are coiled or twisted), decide which two salamanders out of 13 have the same pattern, and much more...Pair off coiled shapes by their length; Play number games with a stack of dice; Match 13 salamanders crawling in different directions across the page; Match figures to their shadows