This is a math game from our math curriculum, Right Start.
Object: To make 15 using 2 or more cards.
Materials: basic number cards numbers 1 to 9, 4 of each number
To play: Lay out the cards face up in a 4 by 4 grid. The remaining is the stock pile. Players take turns finding as many sets of cards that equal 15 as they can. Sets can only be found in either a row or column. As the player finds sets (in the example above you see that Little Bean found 5, 5, and 5= 15 and 8, 1, and 6= 15), they remove them from the board. When no more sets can be found, the empty spaces are replaced with cards from the stock and the next player takes a turn. When no stock is left, players can find sets in any position (ie they can find sets that are not in rows or columns). If no sets are found by a player, the corner cards are swapped with cards from the stock and the next player takes a turn.
Thoughts: This was a fun one. I'm always impressed with the games that we learn with Right Start. Try this one with your kids and let me know how it goes!