Have you seen this book?
My Map Book by Sara Fanelli is a great introduction to maps for young learners. I shared this book with my kindergarten class and of course they immediately wanted to make their own maps. The kids had several ideas that they wanted to try out. They also said that they should add labels to their maps so people would know what the drawings were.
We looked up several different examples of maps made by children on the Internet and the kids were inspired. If you are looking up maps, make sure to look up Maps of Reggio Emilia by Children. There are some amazing examples of kid drawn maps that took hours of collaborative effort. In a half day kindergarten class, we didn't get too far on our maps, but several families told me that their kids continued their map making at home.
Happy map making!