If there is a Mela (Local Fair) around your location, take your parents there and enjoy fun activities.
Go on an early morning walk with your parents and enjoy the beauty of the morning and also watch the sunset in the evening.
Present your parents with beautiful traditional Indian attire such as sarees, kurta-pajamas, or sherwanis.
Organize a music evening with other family members for your parents. Sing songs and dance to Indian classical music.
Cook your parents’ favorite food for them. This will stronger your bond with them.