Kids cardigans earn their place by coming off easily when the room warms up. For toddler girls, Aimama has button-front cotton knits, including flower details and ruffles. Its main cardigan styles are 100% cotton, with sizes from 12-18 months through 8-9 years across the options. There are V-neck styles too. For babies, Imps & Elfs makes organic cotton cardigans in newborn to 12-month sizes. Try the fit over the layer your child will wear underneath. The buttons shouldn't pull across the chest, and cuffs should leave hands free for play.