Play cards together with your child. An easy game to reinforce basic skills is WAR. Divide the deck equally between you and your child. Players do not look at their cards and keep them face down in a stack. Each player turns over one card at a time simultaneously. the red cards are negative and the black cards are positive. 6th : the player with the higher value number wins the cards; 7th : the player that calls out the correct sum first wins the cards; 8th : the player that calls out the correct sum wins the cards.