Wow, this could almost be us! The only detail that is different is that we give our daughter .50 per year of age - so at 10, she will get $5.00. We insist that she put half of her allowance into her 'savings jar' for bigger items that she might want. The other have is pin money to spend.
We were advised to start the allowance when DD was about 5 from a very wise, experienced, thrifty mom of 4. I was going crazy dealing with the "gimmies" from DD, and to my shock, my friend said, "Give her an allowance and make HER responsible for her choices". Her second word of advice was, "Unless it's going to be dangerous or unhealthy, you have to let your daughter make financial mistakes and poor choices with her money. That's the best way for her to learn".
So of course DD blew all her money on CANDY for the first month. I almost bit my tongue in half! But amazingly enough, within 3 months she stopped buying sweets and really started thinking hard about her purchases. Nowadays, she often will go weeks without spending a dime and saves a serious amount in her wallet to spend on a nicer toy.
We expect we will need to review how we give DD her allowance once she is about 12 - I want to start getting her to budget, and take greater responsibility for more choices like clothing, school supplies, gifts and toiletries. Our goal is that by the time DD is 18, she's getting a much larger monthly allowance from us but handling most of the purchasing decisions herself.
It's scary when you really think about it, such a short time to teach financial literacy!!!....