Another way we have been practicing addition has been with or dominoes. My kids have really loved playing dominoes and then recording their addition sentences.
We used the wonderful packet created by The Moffat Girls! If you have not checked out their blog, you MUST head over there!!
Here is the link: http://moffattgirls.blogspot.com/2012/09/fall-math-pack-freebie.html
We also have used our Pattern Blocks to make creations and then add up our shapes! I found this activity here from Mrs. Will’s Kindergarten!