You can go to Mother Nature's Farm, we went there last year and today, but it was way too hot today so maybe next weekend if it cools off. I thought they had more to offer last year, but maybe I just forgot... It is $3 for adults and $7 for kids (you can go to their website and print off a free coupon for one adult). What to expect: not much, a store, a lame hay ride (but it is a real tractor and hay so kids like it), some giant pumpkins, the kids get to pick their own small pumpkin and decorate it with stickers, there is a bouncy thing (too dark to really see in), and some animals to look at - cow, goats, chickens, roosters...
They are located on Gilbert and Baseline. http://www.mothernaturesfarm.com/