Number cards can be used in so many ways. I like to laminate these, punch holes and store them on a metal ring. I can throw these in my bag to work on the go or at home. My son loves to "go on a mission" whether at home or out at the park I will spread out a bunch of the cards and send him looking for one of the numbers. I give different tips "the number is 1 more than___", "6+2=___". The possibilities are endless.