The 2016 study you mention describes Jain Saraswati Sadhana as a structured, time-bound regimen, not just chanting for 30 minutes. A simple, child-friendly way to understand and practice it is:

What Saraswati Sadhana is (in short)

• A 36-day program that combines chanting with focused meditation and mindful activities to sharpen memory and concentration.
• It involves chanting a single mantra while simultaneously engaging the senses (seeing, hearing, speaking, and writing) in a coordinated way.
• Practitioners typically spend about two hours each day on the practices, often divided into different parts (chants, writing, and meditative exercises).

How to do it (simple, step-by-step) 1) Prepare your space and time

• Find a clean, quiet place.
• Pick a fixed time each day (for example, after school or before evening study).
• Wear comfortable clothes and sit in a stable posture.

2) Start with a quick sacred orientation

• Begin with a short respectful intention and a calm breath to focus the mind.
• You may begin with a Navkar Mantra or a short opening prayer to center yourself.

3) The core practice: chant, see, hear, and write

• Use a single Saraswati-related mantra (commonly used in learning contexts) and focus on its sound and meaning.
• Simultaneously:

- See the written form of the mantra (if printed faintly on a page). - Listen to or recite the mantra aloud. - Write over or reproduce the faint printed mantra with careful hands as you chant.

• Do this for a substantial, but age-appropriate, stretch of time (the study describes about two hours daily, often split into segments).

4) Meditative and reflective parts

• After the chanting-writing segment, spend some time in a light, steady meditation or quiet reflection (Kayotsarga-style calm) focusing on the breath or a simple, wholesome thought.
• Keep the practice gentle and non-striving; the aim is steady focus and calm.

5) Gentle daily discipline to support practice

• Keep a small, neat journal of your study goals, what you learned, and any distractions you noticed.
• Practice ahimsa (non-harm) and truthfulness in daily actions; a calm, truthful mind supports better learning.
• Start study sessions with the Saraswati practice, then proceed to reading or problem-solving.

6) Completion and routine

• At the end of each day, offer a brief gratitude or soft remembrance of the learning goal.
• For the full effect, maintain consistency across the 36 days, even if some days are shorter.

Notes and nuances

• The Saraswati Sadhana described is more a community-supported practice than a canonical scriptural procedure; it has been popular among Jain families and monastic teachers as a memory and concentration aid for children.
• Traditions can vary in wording or emphasis between Shwetambar and Digambar communities, but the essential idea—focused mantra practice integrated with mindful actions—remains shared in many Jain learning contexts.
• If you are guiding children, keep it gentle and age-appropriate; the goal is inner clarity and steady study habit, not forced rigor.

You can read more here