This certainly makes you think out side the box. Sealed envelopes guide you through each stage, some clues are carried forward to the next envelope - you have to work out what they are. Loved it. Very satisfying when you get through. They have an online help if you need it which is easy to follow. It also shows you how to put the game back together to be able to play it again. Putting the right clues and puzzle pieces in the envelopes is important. Some of the puzzles are thick card mechanical puzzles so you do need a table to spread out the clues. Great to have a game that we can all work at together and that is different from the standard board game.