It's a little strange to be reviewing a freebie, but I wanted to advise people that the title is somewhat misleading: it is NOT a guide to naval combat with paper ships; it is the barest bones of an outline for playing an extremely simple game using ships. It is suitable for children from 5 or 6 to about 10, even though the rules say it is suitable for age 12 on up. I was disappointed, as I had hoped it would help me design a naval wargame for kids in the 11-14 age range, but it really isn't.