Hisss (Gamewright, 2006) is simple to learn, quick, and fun to play!
Easily playable by 4-year-old, fun for kids as old as 10, and parents.
Sole materials are the cardboard cards, featuring snake heads or snake tails in one of six bright colors, or else a snake trunk with different colored edges. Players take turns drawing a card and matching it by color to existing snakes. When a player completes a snake by adding the final tail or head, they win that snake, which is worth the number of cards of which it consists.
There are a few easily mastered tricks, such as linking two pre-existing snakes together; otherwise, the luck of the draw determines the winner – but since a good draw can win a long snake, it is usually the case that nobody is out until very late in the game, and tensions run high!