The subject because I was initially a little skeptical but, as it still is a "Digital" -Unterwasserwelt, but the result has convinced me. In addition, one has thereby bright-intensive colors, which facilitate the puzzle of no less than 3000 parts yet. My Puzzles I build always be found on MDF (hardboard) panels 4mm at the hardware store to get the wood cut.
Also, I've only read that the puzzle addressed the same creative brain regions, as in painting, so who even want a bigger motive puzzles, can access calm. ;) It took me about 2 weeks.