There is a Rainforest Cafe, so you if you have the Safari club, you can get the free appetizer or discount. I usually get the free appetizer as my meal (pita quesadilla). If you do MyPoints rewards, you can maybe cash out for a Rainforest GC. But you need a few weeks to receive that. Sometimes there are free kids meal coupons out for RFC. You don't say your daughter's age.
There was a soup and salad special on weekdays at Cadillac Ranch that was reasonable.
I get an envelope full of coupon deals in the mail from our local area. There are usually Ruby Tuesday coupons in there (B1G1F). I am not sure if the MOA Ruby Tuesday's would accept those or not.
Tucci Benuch has a pizza that is reasonable.
There is a decent food court there. Lots of choices: Mexican, Japanese, Chinese, Thai, McDonalds, Long John Silvers, etc.
I really don't buy much when I go (for a yearly girls weekend). Mostly because of baggage restrictions, but also because it is stuff I can get at home. I don't find the prices to be better - except the no sales tax thing. What I have purchased has been some local Minnesota stuff like wild rice. There are a few stores there that I don't have at home, so I did buy a few things there. Like an Ed Hardy shirt for my DD, bath bombs from Basin, and loose tea from Teavana. Although we have gotten a Teavana since I went to MOA last, so I didn't buy tea this time around.
Also, request the Mall of America Visit Kit from their website. Sometimes they send coupons with those. The first time I went to MOA, I stayed at a hotel that had a "shopping package" where I got a free coupon book. I didn't find it very useful, but maybe you will. You can purchase these for $12.50 on their website. But I don't recommend it.
Maggie