The Desert Museum is an incredible zoo, featuring animals from all over the Sonoran Desert! You'll get to see javelinas, coyotes, mountain lions, scorpions, stingrays (For real! Make sure you feed them!!) and whatever you do, make sure you catch the Raptor Show. There are gardens, an earth and science center, and an aquarium, along with a couple restaurants. Be sure to wear comfortable shoes. Strollers are welcome. $24/adults, $12/kids.
This is a great spot for hiking! There are several different hikes you can go on here, and the website has great descriptions. We love the Birding Trail and the Canyon Loop Trail. You will need to pay to get into the park - $7 per car.
If you're looking for some nightlife on the Saturday of our wedding weekend, 2nd Saturdays is a free, family-friendly music festival held downtown every 2nd Saturday of every month. Congress Street is full of music, vendors, street performers and more. There are also a bunch of fun bars in the area.