Genius idea that makes doing puzzles way easier!
582808
These are fantastic. I love that they nest so it saves a ton of space. And the puzzle that came with it is really cute. A great gift for someone who loves doing puzzles.
4136282
OMG - What a cool idea! So the way it works is that there are 9 letters instead of 9 numbers. Then at the end, you have to circle the naughty word or phrase...so it is sort of like a word scramble, a word search, and a Sudoku puzzle all in one. But it is soooooooo naughy and cool! LOVE!
1477728
Worked perfect for our puzzles of various sizes! My son loves it
2382941
A challenging, but fun puzzle that will make you walk away (and come back) after multiple attempts! I bought this as a gift for my boyfriend who is a beer nerd and a physics graduate student. Assembly took about 15 mins (ditch the instructions and watch the video), and he spent about 30 mins for the first attempt with no luck. He's bound to solve is soon so he can get the barrel aged beer I put in there.
4288325
It took me a few minutes to get used to how to move around the Sudoku board but then I took off!  So much easier than erasing with a pencil or worse yet, a pen!  Kindle makes it so easy to play and I don't have to look around for the puzzles!
4587921
These are a great way to start sorting your pieces into small groups to work.  I love that they stack and can go right back in the box for transporting.  I think I want a 2nd set for my bigger puzzles.  :)
1913341
I am currently putting this puzzle together and it is taking longer than I thought it would.  I work on it for several hours a day and only get a few pieces placed.  Goes faster and is more fun when my husband helps! :)
4883373
As a kid I always wanted to learn how to solve the cube.  I found this product one day and off I went.  I was solving the cube in no time.  I'm at 2 and half minutes right now and slowly getting the time down.  The cube that comes with the kit is a really nice.  The DVD is extremely helpful and funny at times.  Don't try to read through the booklet without watching the DVD because you will get stuck.

The hardest part is memorizing the last few moves, but if you put your mind to it you will succeed!
1315269
The perfect thing about this book is that the puzzles slowly get harder and harder so you can work up to the challenging ones. Plus the answers are in the back if you get stumped!
3481970
This was honestly the most fun puzzle my spouse and I ever built together.  We avoided looking at the box during the process, which ended up being hilarious due to all of the distinct font and artwork types through the puzzle.  It was a cool challenge that way.  The pieces were not very reflective, which made it easier to build under the ceiling fan lights than other puzzles we've done.  Passed it on to my mom afterward to share the fun!
1283470
My 3 yr old grandson can put the puzzles together without any help!! It really help develop his ability to visualize and put together complex thinking!!
536957
This disk-puzzle is essentially a Russian reinvention of the vintage classic "Tower Of Hanoi" stacking puzzle. The goal is to slide the 7 individually colored chips from the inner circle to one of the two lines at either side of the outer edge of the disk, with the challenge being that each chip will move only as far as it's matching color slot (forcing the chip past it's own slot may DAMAGE the puzzle). The puzzle is very convenient to play anytime and anywhere...besides being compact, it also has a clear cover that snaps onto the front and each chip also clicks into place, which allows you to stop playing, cover it, and go back and play at a later time with everything still intact! Overall, four and half stars for a nicely produced puzzle.
3517516
What a great idea for a fun Christmas gift!  I am going to use this for playing the game where you get to steal someone's gift or take a new one at our family Christmas party. They'll know that there is hidden money available when they solve the puzzle but won't know how much.  I can't wait to see how the game plats out. The puzzle came very quickly, and great customer service.  This is really a perfect way to give money as a gift.
2070955
The jigsaw part of the puzzle is pretty awesome, and challenging. I've never seen so many people complain about a puzzle's difficulty!  May not be able to put together the same way you do normal puzzles. I starteted with the words on the map, then roads & rivers, then words in the sea, filled in from there, and finally did the edges.

I would give this 5 stars, but there is a missing piece and I've contacted the company twice for a replacement piece but there has been no response at all!
1799931
Ive found my new go-to birthday gift! RiddleCube is a great game, the kind you can easily pick up for a few minutes or an hour, on your own or with a group, whether you want to keep score or just do a few rounds for fun. My 9-year-old was immediately attracted to its tactile nature, and my 4-year-old loved inventing her own versions of the shapes we were attempting. We moved quickly through the easy cards, and had a lot of fun trying to convince each other that our designs fit the written criteria for the more difficult cards! It was good to emphasize that the strings are considered invisible for some designs, or they would have been frustrating. We didn't want to put the riddle cubes down between rounds; when I played with friends, we ended up fiddling with them while we chatted - several of us found it quite therapeutic! I think well be buying this game to my sons class - his teacher will like the spatial reasoning it promotes, and his friends will enjoy competing and manipulating these addictive little cubes!
1223154
This puzzle was a joy to assemble - the pieces feel nice in your hand, fit together perfectly, have virtually no dust, rarely stick together in the box, and rarely lift up when you've been lying across the semi-completed sections to reach a different part.

- This is not a technically difficult puzzle. The only thing that makes it hard is the number of pieces. The pieces are almost all the standard "two ins and two outs" shape, with a few internal pieces that are concave or convex on one side. There's so much detail in the map that almost every piece can be placed by logic, rather than brute force trial and error.

- This puzzle has multiple identically-cut pieces. We found about 10 (including, as another review mentioned, some edge pieces) close enough in color that they were initially incorrectly placed. But we were never able to identify a pattern to the placement of paired pieces.

- Geographical knowledge helps immensely, but working the puzzle without outside resources doesn't necessarily increase your geographical knowledge. I found I knew far more about where in the world things were after I used Google Maps to place things (particularly islands) than when I used pattern / color / shape matching standard puzzle techniques. Also, particularly for islands, Google makes things go a lot faster.

- Also helpful: shallow stacking plastic food storage containers to hold various groups of sorted pieces. My dining room table was big enough for the puzzle, but not big enough for a piece boneyard also.

- It took us not more than 100 person hours, but definitely not fewer than 80 person hours, over 9 days to finish. This is one where working it in big chunks of time is much more efficient.
1566851
My son loves to do this puzzle.  He received it as a gift for his 4th birthday, so he still needs adult assistance for some of the more intricate areas of the puzzle, but he can get most of it done all by himself already.  He's learning to identify countries by their shape and remember where they should be placed relative to one another.  In fact, I should probably do it more often myself, because his geography skills are already better than mine!