| Brand | ThinkFun |
|---|---|
| Type | Puzzle Box |
| Country of Origin | China |
Check the listing for details. ThinkFun Flip-Side Brainteaser Challenge Puzzle Game – New Open Box. Condition: New, Made in China. Listed at 19.99 USD. This engaging single-player brain teaser challenges you to line up the numbers from 0 through 9 by sliding the tiles and flipping the center cylinder. Each flip reverses several numbers, making the puzzle more challenging as you work toward the correct sequence.