These science card decks feature lots of facts, trivia, and colorful illustrations. Modeled after standard playing cards, each card is numbered and there are four colored suits so you can play variations of Go Fish, Gin Rummy, Crazy Eights, Solitaire, and War. A dozen challenge cards are also included to test your newly acquired knowledge. I found the Ocean Cards to be so captivating that I didn’t even bother with the game guide until I’d looked at the pictures and read through all the facts about various creatures in the ocean. ~ Anh