The zoo is always a great idea for the family. We went on an overcast and cool day so the place wasn't crowded...which I liked. We got there late morning so many of the animals were in places we couldn't always see.
The zoo is sectioned off in regions. One end is Africa and the other is North America. You can park at either end and walk or take a tram to the opposite end. I believe it is about a 7 mile walk from one end to the other. From both sides it is an uphill walk so be prepared. They have booths at certain major exhibits that are for educational purposes.
The exhibits are very nice and they try to make it as natural as possible. The way the exhibits are actually allows you to be safely up close to the animals if they came near. They'll have special exhibits throughout the year also.
Gift shops are actually pretty nice and offer many different price points. Food is mediocre. I would recommend bringing your own picnic. Sometimes the restaurants or food places are closed too. They have single and double stroller rentals. Check out their website for the different events they hold and for info.
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