I've been following this thread for ideas too. We go in 10 months, so plenty of time for me to save $$. We will have our entire package with dining paid for by the time we go, and I'd like to have cash in hand for the extras, and not charge anything. We are on the dining plan, and here's my plan so far:
$50/day for 10 days for any extras (includes extra sodas for DH, any extra kid meals we need to pay OOP for, balloons, etc): $500 total
plus
$100 per each child for souvenirs for the trip: $300 total
plus
$100 in taxi $$ and tips for mousekeeping, valets, etc
plus
$100 for family souvenirs like Christmas ornaments, etc
(Grandma and Grandpa, also coming, are in charge of buying t-shirts and hats!)
So that adds up to $1000 total. I'm not sure we'll really need $50 a day for the misc. stuff though. We're eating breakfast in our room. But you never know! By the time we go, we will have almost $500 in Disney reward dollars, and I have another $250 saved, so we'll getting there!
By the way, not to hijack the thread, but for those whose kids have their own spending $$, how do you keep it? How do you keep it seperate in your wallet? They are too young to carry it themselves, I think, and I don't want to get them Disney cards, since they'll have a hard time understanding how much is left (they need to SEE it disappear, you know?).