Mint for Colic?

My son was very colicky for the first months of his life. He is 4 months old now, and much better, but sometimes he has painful gas. Someone told me to try mint. Is this safe? How would I prepare this? Should I buy herbal tea, or buy the plant and boil it or what? If you have tried this did it work? I waas looking online and it mentioned chamomile for colic as well. Thanks!