From a Spanish website, interesting construction!
Ravelry: Azel Pullover pattern by Heidi May
40 Knit Baby Booties with Pattern - Mais - Crafting DIY Center
Free knitting pattern for Baby Sleeping Bag in garter stitch with hood, button front and tassel Más
Peto de punto de bebé “Topitos” Pattern is in spanish. You could also choose another colourwork pattern and just use this for a basic baby pattern
A simple crochet pattern for a Unisex No-Frills "Croc Sock" liner! Fits inside the store-bought "Crocs" perfectly, turning them into cozy house-shoes
Ravelry: Pepper pattern by Elena Nodel. This is knitted, but I think I could work it out in crochet!