Play Date Cardi crochet pattern by Little Abbee Patterns.
To fit sizes 0 – 6 months
One of my favorite things about this sweater is that it works up pretty fast because it uses worsted weight yarn. This would be a cute spring/summer sweater. If you want to make it warmer for winter, just sew the buttons all the way down the front of the sweater and crochet long sleeves.
Find the free baby cardi pattern here: link