My daughter, free spirit that she is, designed her own based on one in the book. She’s 8, and sewed this all herself.
I sewed one that my husband designed in the style of the book’s monsters.
And my son, aged 10, sewed this one by himself, and decided that, much like the wand chooses the wizard (Harry Potter reference), the sewing machine chooses the sewer.
Apparently my old Necchi chose him, and he’s hardly been off it since.