Roberta's only friend in the beginning of the book Roe-bot Girl: Best Friend App is a Snowman Robot doll she calls Snow. Snow’s full name was SNOW RIP, which was an acronym for “So no one within reach inclined to play”. Snow is interactive and lights up later on in the book but at the beginning of the book he does not work anymore. This Instructable will show how to make the doll.
This is how you can design and print your own form of the doll with TinkerCAD.
Shown below is a Mini Snow doll in his vacation cottage.
I pictured the doll in the book to be an 18" doll similar in size to an American Girl Doll. I designed and printed the example in the picture to be about the size of an "Mini American Girl" doll, he ended up being about 7".
This Instructable has assumed you have a log in at TinkerCAD and have gone through the Lessons. (It is free)
If you want to have a cloth body for Snow then you'll have to have some cloth and a way to sew it. This is not covered in this Instructable.