We love Big Numbers! All six of my children, ages 2 through 13, enjoy playing this game. I enjoyed it myself. The beginning is a little slow for older players, but the pace quickens soon enough. Younger players learn adding, subtracting, and writing numerals. Older players find challenge in using resources efficiently. Everybody loves picking apples and cracking rocks!
We Want To Know customer service is excellent. When this app first came out, it did not work on the kindle, but they were very responsive and released a working version quickly. They were happy to receive our bug reports and fixed those in another update.
I agree with other reviewers that this app is worth every penny.