We walked over 5 miles with a four- and nine-year-...

We walked over 5 miles with a four- and nine-year-old. So, let's back up to the beginning. We bought our tickets ahead of time from the Go San Diego Card for a discount. Parking is free. Our first stop was to take the bus tour. I think it was the best choice we made all day. Thirty to 45 minutes of a narrated bus tour. Well worth it. We then walked all over the place. The Kangaroo Bus saved us at the end of the day and brought us back near the exit. The zoo was incredible! We loved every part of it. Great bathrooms, food choices and options.