Marty is a fun character that kids can relate to. It’s part of a series that can be read in any order. This particular adventure is about a Save the Earth contest at Marty’s school where she chooses to use worms for composting. We loved the slimy yuck humor and also learned a lot.
I would recommend this for independent reading towards the end of 2nd grade into 3rd. I read this with my going-into-2nd grader.