I’ve always loved organizers, so here’s one I particularly love:
Take a folder, two pieces of paper (i used regular paper, but it’d probably be best to do card stock or construction paper, because the regular paper starts breaking after a while) and dividers. Glue the pieces of paper so the edges of the paper were in the folder so that if you open the folder it has “walls.” Then put the dividers in and volio! An organizer for sorting papers! Not top quality, but it is made out of recycled materials.