For inspiration, here is an inexhaustive list of projects that may or may not have been completed in past years:
A whole quilt, or a quilt block/day
Embroidery! practice a stitch/day
Other needle crafts
Knitting, crochet, weaving…
Sew costumes for a small creature
Decorative toilet seat covers
Postcard a day (make or send?)
Mini Zine/day
Book binding/making notebooks
Haikus, other poems, with and without illustration
Doodling, drawing, painting, collages, screen printing, etc
Photography
Origami
Bird/day
Illustrations of other animals
Flowers
Music! Practice an instrument, work on a few songs over the month or make up a new little thing each day?
Baking
Go for a walk
Play dress up/try out new outfits