For chronic colic in young children over 6 months age especially the one who have colic during evening there is simple ayurvedic remedy given in iacient indian text.

Take a spoon full of fresh garlic juice and mix with equal quantity of honey and mix well and give the child daily for week and colic simply disappears.
This can be used on neonates.
This can be very helpful for special children with muscular disorders and cerebral palsy who who suffer from prolonged gastric trouble

Babies under a year should not have honey.