We’ve all made the nesting boxes and roosting shelves, probably bird feeders and bird baths, but have you tried a nesting bag? These are super fun to make with the whole unit, and they can take them home and hang them up, or you can hang them at your local park or schoolyard!
Check out the instructions here: https://cwf-fcf.org/en/resources/DIY/habitat-projects/map-your-backyard/provide-nesting-materials-for.html
