Thankfully we had some library passes that allowed both my kids to get in free with the purchase on 2 adult tickets. And thankfully these were allowed to be used at once, unlike some of the other discounted tickets available.
Outside of the cost (which was still $42 for two adults) my kids (6 and 3) greatly enjoyed the variety of things to do. In addition to the numerous animals to feed and pet, there are several different play areas, a bouncy house, and importantly lots of seating areas for Mom and Dad. The kids most enjoyed the water area, especially the bubble circle. They also added a slide in the Adventure Land area, which was nice.
One helpful feature is the ability to bring your own lunch, which we did. Otherwise I'm guessing we would have paid around $35 for lunch. Overall the place was super clean, especially the restroom, and the workers were all helpful.