For vomiting, you can give him Syp Emeset (Ondansetron 2mg/5ml) 7.5 ml now. After 20-25 mins, give him water/food. Dose may be repeated after 8hrs, if he vomits again.
For temperature > 100 deg F, you may give him Syp Calpol DS (Paracetamol 250 mg/5ml) 4 ml, dose can be repeated in 4-6 hrs if fever.
Keep him hydrated. Give him small sips of water/milk/clear soup frequently. Watch for other symptoms like tummy pain, loose stools, urinary problems, high grade fever, drowsiness.
Next Steps
If vomiting continues or child appears dull or any of above mentioned symptoms, please visit a pediatrician.