Here's a link with several ideas:
When the kids were young, I purchased cork bulletin boards from Walmart. They have decent sized boards for around $8. I embellished each one with their name and let them hang up whatever they wanted. If the children are too young for push pins, make magnetic boards from cookie sheets.
Check out the purple file sorter in this post. https://jessicawellinginteriors.com/diy-floating-desk/
Hi ! I would screw some o hooks , screwed into the wall studs and run clothesline between them , then hang the artwork with clothes pins .
Two command hooks with twine and colorful clothes pins make it super easy to change out.