Check out these amazing acrylic puzzles from MAKE Flickr photo pool member Fibra! They look like something Superman’s dad would give his kid – “This extremely difficult cube puzzle is made of 6 piecees of laser cut acrylic. I made it in different colours and 2 sizes, 35 and 55mm. It could be assembled/disasembled in 18 sequencial moves minimum. I make it from the end of 2005. and never heard anybody assembled it. “ – Link.