On Makarsankranti there is tradition of Kite flying. It is very popular in Rajasthan and Gujarat.
The tradition started in old days when Kite-flying was generally done in the early hours of the morning, when the sun's rays were bright but not too harsh.

Also, during kite-flying in Sun, the human body was exposed to the sun for many long hours.
The early morning sun rays is considered beneficial for the skin and body.

This is fun way to involve kids in religious festival so that they get benefit from sun rays.