I have to chime in and agree with those that have the kiddos use their "own" money. I got crafty a while back and traced/drew a 2ft high Cinderella's Castle (with 10 spires) that gets put up onto the fridge a few weeks or months before a WDW trip. Each child has 10 magnets that go up onto the castle spires each day for chores, being nice to your sibling, helping mom, etc. 10 magnets/day = $1 Disney Dollar

I hate dealing with the gimme's at the parks and this method negates all of that. They use their Disney Dollars for everything that they want - toys, clothes, Mickey Bars, face painting, etc. They learn great lessons about earning money, saving, budgeting, price comparisons, etc. They have already asked me when the chart is going up for the trip in September - we'll probably start in summer so that they can "earn" up to $100 each.