Clever

From BoardGameGeek:

CLEVER is an educational card game that allows players to explore numerous connections to be made between cards representing objects and images with colors, categories, letters & numbers. Out of the box, CLEVER is playable as a 2-5 person rummy-style game. The object is to get rid of all your cards by playing them in sets of three or more related cards. Cards are related by being sequential in order, spelling a word, matching color, matching category, or being used in a math equation. It's worth noting that CLEVER is a deck of cards that can be used to create and play different games of players choosing. While the instructions that come with the game offer the rummy-style game mentioned above, trick-taking games, memory games and entirely new games utilizing the multidimensional aspects of the cards are certainly possible with the CLEVER deck.