Mastery over rhythm, especially when shifting between first speed ( Prathama Kala ) and second speed ( Dwitiya Kala ).
Several dedicated Carnatic bloggers have meticulously transcribed the Sangeetha Bala Padam exercises into Roman script (English) and PDF format for non-Tamil/Telugu speakers. Websites like PerfectlyInsane or Carnatica feature direct Google Drive PDF download links for individual Varnams. How to Practice Varnams Using the PDF Notation sangeetha bala padam varnam pdf link
Open Archive.org and use the search bar to type "Sangeetha Bala Padam" or "Sangeetha Bala Padam Ponniah Pillai" . Mastery over rhythm, especially when shifting between first