Playing cards are useful for so many things, We play number games, of course. They can be quite the tool to teach numbers to beginners. My older Lambies like to play poker, blackjack and "Doubt It". We all play "Spike and Mallet". I really enjoyed cribbage as a teen and young adult. I need to brush up on it and teach it to the Lambies. I have one, however, that is much more interested in the building properties of cards. He's trying to learn how to challenge this guy.