How do I make a hanging art holder for a kid's room?

Here's a link with several ideas:

https://www.pinterest.com/sheripress/hanging-kids-artwork/

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.

https://craftsbyamanda.com/magnetic-board/

https://www.favecrafts.com/Storage-and-Organization/Dollar-Store-Cookie-Sheet-Magnet-Board

https://www.mrshappyhomemaker.com/2042/

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.

I would put a several ropes on a wall. The use small colorful clips to hang the art on the wall.