Pile up the pups! Choose a challange card and work out the puzzle of fitting selected dogs onto the card. Dog Stax is a great, brain-bending, puppy-puzzle game from BrainWright. Comes with 48 challenge cards, 12 dogs, a travel case, and the rules of play. Imported. 1 player. Ages 10 and up. Choking hazard warning, keep out of reach of children under 3 years.