Blender is my new babysitter for my 7-year-old

Any advice on models I should walk her through? She’s playing around with colors on a snowman she made all by her self sort of.

what does the snowman look like?

Check out some beginner’s drawing books, many of the concepts of seeing the basic shapes that make up an object will apply well to modeling.

The most basic Blender tutorials I have ever found. Very good explanation of many many features and methods. I would think great for any age that can wield a mouse.
Go to the Video Tutorial section.