Check with AAA on tickets, and look at mousesavers.com. Mousesavers is the only one that I would trust.

AAA offers a kids meal card for $20. It can save a little money if you are eating out a lot in Orlando.

I do suggest that you stay at one of the resorts - it makes things easier if you can just get in and out quickly.
If you really need to save money, then rent a townhouse timeshare if you are staying for a week. I like Coral Cay if I am staying over a week in Orlando, as it is isolated, and fairly priced with lots of amenities.