Another great thing to use to teach adding is dice. Take turns rolling the dice and recording an addition sentence. If the child gets the addition problem correct, he or she gets another turn. If he or she gets it wrong, they have to let someone else have a turn. You can even extend this to word problems by having them make up stories about their number sentences.
Cards are good addition teachers, also.
Again, you can help your child make up stories to reinforce what he or she has learned and expand into word problems. Use fun things as counters. Counters help a child figure out the answer and give your child a firmer understanding of qualitative concepts. Food works wonders because you can always use the incentive that they get to eat their work when they are finished. Make up addition rhymes.