This place is amazing. It's a hidden gem in Zionsville. If your kids like nature, and animals, and…read morehandling animal skulls and skins, then you will love the Zion Nature Center.
This is a small, cottage-like nature center, but there are lots of little exhibits set up throughout. One room is all about pollinators, so you can see a honeybee hive through glass, and touch wasp nests and peer at (dead) monarch butterflies up close. Another room has a pair of microscopes set up to view pollen and spores. That same room has animal skins (shed snake skin, coyote hide, etc.) that you can pick up and touch. There's a basket full of animal feet (so hardcore) there too, like deer feet and a giant poultry claw. It's kind of gross and cool at the same time.
The best room, according to my kids, is what they dubbed the "play room," because it has a bunch of toys, games, puzzles, stuffed animals, puppets and kids books. If you have young kids, you can probably stay in that room for at least an hour or more. There are wooden blocks to play with, and also a giant chalkboard wall that you can draw on.
Zion Nature Center also offers educational classes and summer camp, too. Check their website -- they have an updated list of what they offer on their site.
Adjacent to the nature center is a small playground with slides, a climbing wall and other fun stuff. There is also a hiking / walking trail (Zion Nature Sanctuary) several steps away, where you can go creek stomping and traversing through nature.
One thing to note is that Zion Nature Center sits on the grounds of an elementary school, and the hours of operation reflect that. The nature center is only open on weekend and select holidays when school is out. Call or visit their webs try to make sure they are open before you visit.