Looks like some kind of stomach infection, you can take syp.Domstal 2.5 ml if vomiting occurs. This kind of infections usually settle down by 3-4 days. Avoid giving mefkind plus as it will promote stomach irritation. Give plain paracetamol for fever(Syp.Crocin DS 3.5 ml)
Next Steps
Becareful about the fluid intake, give adequate amount of water and ORS
Health Tips
avoid giving outside foods and snacks like chips and Kurkure