my girl is eating all the day but not gaining weight she is so slim and have weight of 12.4 kg only and she is 3 year old now otherwise activities are ok

A. hi weight is little bit less. it seems that though your child is taking food , it is not getting digested well ,child is not getting enough nutrients from it. so , first you need to check if child is taking it well or not , he or she should chew food well. give energy dense food items more.