I tried this out with my 3yo, and it was a really big hit! Lots of room for imagination and shenanigans without being bogged down by too many rules!
I wrote a review below, but it worked great with my LO, and I could see this being a really fun party game with adults too.
https://www.ttrpgkids.com/2021/08/18/all-ages-ttrpg-review-magic-rat/