Question: what to do when a 2 year old keeps vomiting?
Answer: Give clear liquids (avoid milk and milk products) in small amounts every 15 minutes. ... 
If your child vomits, start over with a smaller amount of fluid (2 teaspoons, or about 10 milliliters) and continue as above. ... 
After no vomiting for about 8 hours, introduce solid foods slowly.