The kids then make flowers by matching up the correct pairs of opposites. If you want them to practice handwriting, they can make a list of the opposites. You can also have them to make their own flowers to add new pairs to the game.
This one is just as easy. Each circle has a pair of words on it that need to be made into a contraction. Kids can write a list of the contractions to help them practice writing and spelling, or you could make a second set of circles with the contraction written on them and they can match them up. Challenge them by playing Memory, with the circles upside down.
These were used with a first grade class, but there's no reason you couldn't use them with older or younger kids if they're ready. Have fun!