Creating a Google Drive folder of images and inviting parents as viewers can work, but it's not the most aesthetically-pleasing option. A better option is to create an image carousel in Google Sites. Parents can then simply view the Google Sites page to scroll through the photographs you've published. Another option is to embed a Google Photos album into a Google Site. Both of those options are demonstrated in this short video that I recently published on my YouTube channel.
If you're unfamiliar with the process of creating a Google Photos album or how to share it without inviting collaborators, the last minute of the video above shows you how to do that.