What matters is that the children maintain their connection to the Gohonzon and the SGI for their entire lives.

Sometimes your children may not be able to do gongyo, but there is no reason for parents to become overly concerned or agitated about this. There are times when chanting only three daimoku is sufficient. To continue practicing [even though gongyo may not be consistent] is far more important. What matters is that the children maintain their connection to the Gohonzon and the SGI for their entire lives.

For Today and Tomorrow
Daily Encouragement by Daisaku Ikeda 12/12