From hindsight I offer you 20/20 vision.
Frame them with a picture frame l'koved yom tov.
Once upon a time my child at that age painted the living room to "make it pretty". Literally drew a chair rail height design around the whole room including traced handprints.
This is one of those cherished memories. Iyh you'll paint again but focus on yom tov for now. It will wait & be okay.
Honestly your walls will most likely not look perfect for a few years if you have a toddler, more so if you have a few young kids.
Currently when my kids color on the walls I try to wipe it mostly off with a magic eraser even though it doesn’t look the same as before, and it’s ok. I know when we’re past the toddler stage eventually we can safely repaint the walls.
