Download all the images from 3 Pinterest boards in full quality

We have 3 Pinterest boards that we would like to download all the images from in full quality. So far the only way I can see to do this is to individually click on each card to open it in a new tab and download it from there.

There are about 300 images overall that we would like to download and putting into 3 separate folders (one for each board).

The boards are:

https://pin.it/ERCE85w

https://pin.it/Ekmb06A

https://pin.it/E7beIX2

Thanks,

Joe