Nature Challenge - Dino Black. The Nature Challenge Series introduces you to our planets most amazing dinosaurs. With superbly illustrated cards, discover the characteristics of the best-know species. Each game contains 36 illustrated cards with original and stimulating facts. Bet on the animals’ weights and turn the situation around using their agility rating. At the end of the game, the player showing the strongest characteristic wins the other players’ cards. The first person to collect all of the cards wins the game. Made from recycled and recyclable materials.