Another consideration is this: in spite of years of indoctrination from women's libbers, the fact remains that boys and girls like different sorts of crafts! If the craft seems a little girly, don't use it at boys' camp. Stick with lace-up leather billfolds, Indian artifacts, dinosaur art, and similar projects. Girls will like beads and anything that's pink or purple. For a craft idea for kid camp where there are kids of both sexes, keep it on the boyish side and provide some pink materials to keep the girls happy.
An aspect of creativity that the non-creative types don't realize is that ideas spring from other ideas. That is, if you look over a book or website of craft ideas, maybe none of them will appeal to you, but if you let them, they will spark an idea for a similar project. Use what you can and change what you must in the craft directions. For instance, the craft may have a slogan to be written across the front. If you need to change the slogan to fit your own needs, it's perfectly OK. For instance, the pictured project might say "Girls rock!" You can change that to "He is the Rock!" if that meets your VBS needs better.
A final suggestion is to realize that you don't have to change the instructions or create something new to have a good craft idea for kid use. Feel free to follow the instructions to the letter if that works better for you. The kids will have a great time either way. Just pick a craft idea, for kid creativity beats adult creativity everytime! The kids will make it creative, even if you have doubts about your own ability in this area.