Thrifty me also took a moment to look up Free Parks Days at US National Parks. They are:
I've mentioned it before, but my kids loved it when we visited national parks. We even got them the parks passports which they get to stamp at the ranger stations and they go nuts over it. I figure this year we could use a few more stamps in those passports before they outgrow the novelty of it.
I also searched my free museum options through the Bank of America "Museums on Us" program which offers free entry into the listed museums on the first full weekend of each month. How are the museums GREEN, you ask? Well, some of them are museums of natural history or science, anthropology or archaeology. I file learning about nature as GREEN. The kids loved the mineral & geology exhibit, the great mammal hall & the zoological galleries at the Harvard Museum of Natural History last weekend.
On the plus side of all the new fees I'm paying, they relate to new business I've been working on and will be announcing shortly. 2012 is going to be an exciting year!