I hadn't been there since I was very small, so it was practically new to me. They had some really fun exhibits. Among our favorites were the penguins, which they have in an enclosure with glass on one side, so you can watch the penguins swim. Everyone loved that. It's also "The Year of the Frog" at Zoo Boise, so they had frogs and toads in small terrariums all over the zoo and the boys really liked that, too. There is a rain forest section with more exotic animals, including a meerkat who was very cute.
They also had a few zoo keepers out with animals to let people pet. Calvin liked the snake. They have some playground equipment interspersed among the animals, too, like a slide the size and shape of a giraffe and concrete tunnels the kids could walk through and pop up in the prairie dog enclosure. I thought it was really nice to break things up.
It was a really nice zoo, considering the size. They are currently working on an African section which is supposed to include a lion. I wouldn't make a special trip to visit if I weren't already in the Boise area, but if you're here and have little kids, it's worth a visit.
The basic info, should you want to go:
Open 10-5 year round