Answer

Yes, if children have not formally taken the fast vow, they are not strictly bound by the full vrata rules. In that case, water may be given at night if needed, especially for health and comfort.

Explanation

In Jain tradition, night-time drinking is generally avoided during fasting and daily discipline because it is considered less proper for ahimsa and self-restraint. But for children:

• they may not have taken a formal vow,
• they may not have the strength to observe a strict fast,
• and their health and age should be considered first.

So, in many Jain families, children are not forced into a strict fast, and water is allowed if required. If the child is observing the fast only by family practice and not by a formal vow, the observance should be gentle and age-appropriate.

Spiritual Understanding

Jain fasting is meant to support purity, restraint, and compassion — not to cause harm. For children, the spirit of Jain dharma is better preserved by:

• encouraging discipline gradually,
• protecting health,
• and teaching respect for vows without pressure.

The deeper value is intention, sincerity, and non-violence.

Takeaway

If a child has not taken the vow, water at night is generally allowed when needed. For strict fasting rules, it is always better to follow your family tradition or guidance from a Jain guru.