Shell Game - Memory Puzzle</br></br>Product Description</br></br>Up to six coloured crabs are hiding under shells. You know their starting position?? but can you remember where each one is as you move the shells along preset paths?? swapping their positions. To complete each challenge?? you will need to sequence the moves of the crabs?? a task made far harder since you can't see them. Combine your memory and logic skills and you'll be successful. This clever puzzle has been brilliantly conceived by the people behind 'Rush Hour'. Really clever!</br><br/>http://www.amazon.com/gp/product/B01NCKJ5ZC