I am glad to see we have some great images in this unique challenge. The description of the challenge is currently on Page 7. You can make pinhole images with a digital camera, or get adventurous and try it with film. Here are some images I took yesterday with my Ondu 6X6 Pinhole using Kodak TriX, developed at home.
https://victoriaslight.blog/2021/02/15/ondu-at-sakonnet/