Children can usually hold no more than 4 cards in their hands or you make little standing dividers so children can lay their cards behind a screen. Play Go Fish with the cards by having the child show the card they need a match for. Each child brings a black or white object to group time. Objects are named and placed in middle of the group. All close eyes while teacher or one child comes up and takes one object away and places it in a shopping bag.
Group takes turn guessing what's missing.
Teacher can give clues if necessary.