These Brain Quest cards make for great review and game time. I love them because unlike regular flashcards or memory games, they aren't going to get lost everywhere and separated... they are portable and nice for car trips, doctor's waiting rooms, etc. They make them for all different ages and grades. They can be pricey ($10-$12 for each 2-pack) but if you're lucky you can find them at garage sales! I found a stack of eight unopened ones at a garage sale for just $3.