We were lucky to discover this little museum which was tucked away down a side road. When we visited we were the only people there and the owner of the museum, who was related to one of the Free Thai founders (and possibly the man referred to in the other review), took us around the museum and gave us a lot of information. It was very interesting and something I had previously known nothing about. I can't remember if there was an admission fee, but if there was, it wasn't much money. I would really recommend hunting out this little gem of a museum.