Is it an indoor activity you could do in the winter or I'd it best to visit during the summer?

The Museum of Natural Curiosity does have an outdoor area that’s open during spring, summer, and fall, but there’s the entire rest of the Museum is open year-round!

We went during the winter. There is plenty of activities to keep the kids occupied.

You can do it in the winter. Its inside mostly

Majority is inside I would say, my kids don't usually want to play too long outside there when it is open from spring to fall