Thanks for your query
Your child has developed viral warts
Viral warts can affect any area of the skin but is most common on the trunk of the body, arms, and legs.
It is spread through direct contact or shared items such as clothing or towels which seems to have happened in your children too.
These lesions are very contagious ,so early and proper treatment is very essential
Treatment options include application of agents like retinoic acid
and KOH especially in children, chemical cautery, electric cautery or mechanical curettage.
so i would advise you to visit a dermatologist
soon for proper treatment .
Hope it helps
Dr Geetika Paul