Which is the best ketchup for my child Heinz or Maggi?

It depends on your preference. My kid likes Maggi, though Heinz is equally good. You can try giving him giving both, and get the one he likes the most. But if your kid is small why don't you try homemade chutneys instead. It is more the batter if any condiment is homemade. There are many preservatives in the sauce, so wait to introduce your baby to the sauce if he is too young. http://www.dnaindia.com/money/report-dna-right-choice-choosing-the-best-ketchup-1742545