Because children just learn to walk, in order to stand steady, it is natural to stand their feet in an outward figure. One is related to calcium deficiency in the body. When the calcium content in children's bones is low, their foot bones are amorphous, and the medullary joints on both sides are easy to separate outward due to gravity when walking and standing. Thus forming an "external splayed foot".
Suggestion: pay attention to children. Shoes should fit your feet and wear soft-soled shoes. At the same time, give children more foods rich in protein, calcium and vitamin D, and let them get more sunshine. It generally disappears with age. Bed correction shoes have no effect. If the symptoms get worse, rickets should be considered.